This document discusses non-coding RNA and its important regulatory roles. It notes that while RNA was originally thought to only act as a messenger between DNA and protein, recent evidence shows extensive transcription of non-coding sequences and diverse biological functions of non-coding RNA beyond information transfer. Different types of non-coding RNA are involved in fundamental cellular processes as well as higher-level regulatory functions. Studies have found thousands of non-coding transcripts expressed in complex organisms, and non-coding RNA is emerging as a key player in gene regulation.
Transcriptomics is the study of RNA, single-stranded nucleic acid, which was not separated from the DNA world until the central dogma was formulated by Francis Crick in 1958, i.e., the idea that genetic information is transcribed from DNA to RNA and then translated from RNA into protein.
COMPETENCY 3Integrate credible and relevant sources into coursewLynellBull52
COMPETENCY 3
Integrate credible and relevant sources into coursework to enhance clarity and support claims.
CRITERION
Reflect on how credibility and relevance of a chosen resource were determined.
Your result: Non-Performance
Distinguished
Reflects on how credibility and relevance of a chosen resource were determined. Notes how specific aspects of the assessment were used to determine relevance.
Proficient
Reflects on how credibility and relevance of a chosen resource were determined.
Basic
Explains the concepts of credibility and relevance in general terms, but does not specifically address how this was used to determine if the specific resource was credible and relevant.
Non-Performance
Does not explain the concepts of credibility and relevance in general terms.
Faculty Comments:
I did not see a discussion of source credibility/relevance. For this assignment you were are also required to locate an article in the library about time organizing strategies (outlined in Part I). Then, you were asked in Part II to reflect on how you determined the credibility and relevance of your chosen library resource to support your task prioritization.
ONCOLOGY LETTERS 19: 595-605, 2020
Abstract. Numerous types of molecular mechanisms mediate
the development of cancer. Non-coding RNAs (ncRNAs) are
being increasingly recognized to play important role in medi-
ating the development of diseases, including cancer. Long
non-coding RNAs (lncRNAs) and microRNAs (miRNAs) are
the two most widely studied ncRNAs. Thus far, lncRNAs are
known to have biological roles through a variety of mecha-
nisms, including genetic imprinting, chromatin remodeling,
cell cycle control, splicing regulation, mRNA decay and
translational regulation, and miRNAs regulate gene expres-
sion through the degradation of mRNAs and lncRNAs.
Although ncRNAs account for a major proportion of the total
RNA, the mechanisms underlying the physiological or patho-
logical processes mediated by various types of ncRNAs, and
the specific interaction mechanisms between miRNAs and
lncRNAs in various physiological and pathological processes,
remain largely unknown. Thus, further research in this field
is required. In general, the interaction mechanisms between
miRNAs and lncRNAs in human cancer have become
important research topics, and the study thereof has led to
the recent development of related technologies. By providing
examples and descriptions, and performing chart analysis, the
present study aimed to review the interaction mechanisms and
research approaches for these two types of ncRNAs, as well
as their roles in the occurrence and development of cancer.
These details have far‑reaching significance for the utilization
of these molecules in the diagnosis and treatment of cancer.
Contents
1. Introduction
2. Interactions between lncRNAs and miRNAs
3. Methods of research in to lncRNAs and miRNAs
4. lncRNAs and miRNAs in cancer
5. Conclusion
1. Introduction
In 1993, Lee e ...
Covers the flow of information from DNA to Protein synthesis, Transcription, Types of RNA, Genetic code, Protein Synthesis, Cell Function and cell reproduction
The distinctive character of modern biology is the study of biology as information. Merging of biology and information sciences is a fundamental drive in biomedicine. Indeed, the post-genomic era is providing a huge of amount of molecular data, pertaining to different levels of evidence, which requires specific expertise in raw data processing, explorative data analysis and systems biology.
Translational genomics relies on our ability to recognize the functional elements of the genome and to disentangle the complexity of their interactions, starting from the sequence and following its implications in transcriptomics, proteomics, metabolomics, epigenomics. The promise of genomic medicine is improved diagnosis and treatment through the application of genomic information and technologies, leading to precision medicine.
This talk will give an overview of computational genomics and its current challenges.
Transcriptomics is the study of RNA, single-stranded nucleic acid, which was not separated from the DNA world until the central dogma was formulated by Francis Crick in 1958, i.e., the idea that genetic information is transcribed from DNA to RNA and then translated from RNA into protein.
COMPETENCY 3Integrate credible and relevant sources into coursewLynellBull52
COMPETENCY 3
Integrate credible and relevant sources into coursework to enhance clarity and support claims.
CRITERION
Reflect on how credibility and relevance of a chosen resource were determined.
Your result: Non-Performance
Distinguished
Reflects on how credibility and relevance of a chosen resource were determined. Notes how specific aspects of the assessment were used to determine relevance.
Proficient
Reflects on how credibility and relevance of a chosen resource were determined.
Basic
Explains the concepts of credibility and relevance in general terms, but does not specifically address how this was used to determine if the specific resource was credible and relevant.
Non-Performance
Does not explain the concepts of credibility and relevance in general terms.
Faculty Comments:
I did not see a discussion of source credibility/relevance. For this assignment you were are also required to locate an article in the library about time organizing strategies (outlined in Part I). Then, you were asked in Part II to reflect on how you determined the credibility and relevance of your chosen library resource to support your task prioritization.
ONCOLOGY LETTERS 19: 595-605, 2020
Abstract. Numerous types of molecular mechanisms mediate
the development of cancer. Non-coding RNAs (ncRNAs) are
being increasingly recognized to play important role in medi-
ating the development of diseases, including cancer. Long
non-coding RNAs (lncRNAs) and microRNAs (miRNAs) are
the two most widely studied ncRNAs. Thus far, lncRNAs are
known to have biological roles through a variety of mecha-
nisms, including genetic imprinting, chromatin remodeling,
cell cycle control, splicing regulation, mRNA decay and
translational regulation, and miRNAs regulate gene expres-
sion through the degradation of mRNAs and lncRNAs.
Although ncRNAs account for a major proportion of the total
RNA, the mechanisms underlying the physiological or patho-
logical processes mediated by various types of ncRNAs, and
the specific interaction mechanisms between miRNAs and
lncRNAs in various physiological and pathological processes,
remain largely unknown. Thus, further research in this field
is required. In general, the interaction mechanisms between
miRNAs and lncRNAs in human cancer have become
important research topics, and the study thereof has led to
the recent development of related technologies. By providing
examples and descriptions, and performing chart analysis, the
present study aimed to review the interaction mechanisms and
research approaches for these two types of ncRNAs, as well
as their roles in the occurrence and development of cancer.
These details have far‑reaching significance for the utilization
of these molecules in the diagnosis and treatment of cancer.
Contents
1. Introduction
2. Interactions between lncRNAs and miRNAs
3. Methods of research in to lncRNAs and miRNAs
4. lncRNAs and miRNAs in cancer
5. Conclusion
1. Introduction
In 1993, Lee e ...
Covers the flow of information from DNA to Protein synthesis, Transcription, Types of RNA, Genetic code, Protein Synthesis, Cell Function and cell reproduction
The distinctive character of modern biology is the study of biology as information. Merging of biology and information sciences is a fundamental drive in biomedicine. Indeed, the post-genomic era is providing a huge of amount of molecular data, pertaining to different levels of evidence, which requires specific expertise in raw data processing, explorative data analysis and systems biology.
Translational genomics relies on our ability to recognize the functional elements of the genome and to disentangle the complexity of their interactions, starting from the sequence and following its implications in transcriptomics, proteomics, metabolomics, epigenomics. The promise of genomic medicine is improved diagnosis and treatment through the application of genomic information and technologies, leading to precision medicine.
This talk will give an overview of computational genomics and its current challenges.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
DERIVATION OF MODIFIED BERNOULLI EQUATION WITH VISCOUS EFFECTS AND TERMINAL V...Wasswaderrick3
In this book, we use conservation of energy techniques on a fluid element to derive the Modified Bernoulli equation of flow with viscous or friction effects. We derive the general equation of flow/ velocity and then from this we derive the Pouiselle flow equation, the transition flow equation and the turbulent flow equation. In the situations where there are no viscous effects , the equation reduces to the Bernoulli equation. From experimental results, we are able to include other terms in the Bernoulli equation. We also look at cases where pressure gradients exist. We use the Modified Bernoulli equation to derive equations of flow rate for pipes of different cross sectional areas connected together. We also extend our techniques of energy conservation to a sphere falling in a viscous medium under the effect of gravity. We demonstrate Stokes equation of terminal velocity and turbulent flow equation. We look at a way of calculating the time taken for a body to fall in a viscous medium. We also look at the general equation of terminal velocity.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Slide 1: Title Slide
Extrachromosomal Inheritance
Slide 2: Introduction to Extrachromosomal Inheritance
Definition: Extrachromosomal inheritance refers to the transmission of genetic material that is not found within the nucleus.
Key Components: Involves genes located in mitochondria, chloroplasts, and plasmids.
Slide 3: Mitochondrial Inheritance
Mitochondria: Organelles responsible for energy production.
Mitochondrial DNA (mtDNA): Circular DNA molecule found in mitochondria.
Inheritance Pattern: Maternally inherited, meaning it is passed from mothers to all their offspring.
Diseases: Examples include Leber’s hereditary optic neuropathy (LHON) and mitochondrial myopathy.
Slide 4: Chloroplast Inheritance
Chloroplasts: Organelles responsible for photosynthesis in plants.
Chloroplast DNA (cpDNA): Circular DNA molecule found in chloroplasts.
Inheritance Pattern: Often maternally inherited in most plants, but can vary in some species.
Examples: Variegation in plants, where leaf color patterns are determined by chloroplast DNA.
Slide 5: Plasmid Inheritance
Plasmids: Small, circular DNA molecules found in bacteria and some eukaryotes.
Features: Can carry antibiotic resistance genes and can be transferred between cells through processes like conjugation.
Significance: Important in biotechnology for gene cloning and genetic engineering.
Slide 6: Mechanisms of Extrachromosomal Inheritance
Non-Mendelian Patterns: Do not follow Mendel’s laws of inheritance.
Cytoplasmic Segregation: During cell division, organelles like mitochondria and chloroplasts are randomly distributed to daughter cells.
Heteroplasmy: Presence of more than one type of organellar genome within a cell, leading to variation in expression.
Slide 7: Examples of Extrachromosomal Inheritance
Four O’clock Plant (Mirabilis jalapa): Shows variegated leaves due to different cpDNA in leaf cells.
Petite Mutants in Yeast: Result from mutations in mitochondrial DNA affecting respiration.
Slide 8: Importance of Extrachromosomal Inheritance
Evolution: Provides insight into the evolution of eukaryotic cells.
Medicine: Understanding mitochondrial inheritance helps in diagnosing and treating mitochondrial diseases.
Agriculture: Chloroplast inheritance can be used in plant breeding and genetic modification.
Slide 9: Recent Research and Advances
Gene Editing: Techniques like CRISPR-Cas9 are being used to edit mitochondrial and chloroplast DNA.
Therapies: Development of mitochondrial replacement therapy (MRT) for preventing mitochondrial diseases.
Slide 10: Conclusion
Summary: Extrachromosomal inheritance involves the transmission of genetic material outside the nucleus and plays a crucial role in genetics, medicine, and biotechnology.
Future Directions: Continued research and technological advancements hold promise for new treatments and applications.
Slide 11: Questions and Discussion
Invite Audience: Open the floor for any questions or further discussion on the topic.
PRESENTATION ABOUT PRINCIPLE OF COSMATIC EVALUATION
Non Coding RNA.pdf
1. Non-coding RNA: A Review
(Unveiling the Hidden World of Gene Regulation)
John S. Mattick and Igor V. Makunin
Presented By :
Babita Neupane
Date: 30th Aug, 2023
Mattick, J., Makunin, I., & Non-coding, R. (2006). Human moleculargenetics 15 Spec No 1. R17.
2. About the Journal
✓Human Molecular Genetics under Oxford Academic
(Oxford University Press)- >500 Journals
✓Publishes high quality research articles under human
molecular genetic disease mechanisms from the analysis of
mutated genes and disease susceptibility through to
therapeutics.
✓Publishes one or two review issues yearly.
✓Impact factor = 3.5 (2022)
✓Total cites =41216
✓Biochemistry & Molecular Biology= 150/285
✓Genetics and Heredity =65/171
✓Contribution :This paper, "Non-coding RNA" published in
this journal in Volume 15, Review issue I, pages 17-29, is
authored by John S. Mattick and Igor V. Makunin.
✓Most cited paper yet from this jornal(1.9K citation).
3. About the author
Professor John S. Mattick
Science
School of Biotech& Biomolecular Science
• SHARP Professor of RNA Biology at UNSW
Sydney.
• Executive of Genomics England (2018-2019),
• Director of the Garvan Institute of Medical Research
in Sydney (2012-2018)
• B.Sc. (First Class Honours, Biochemistry) 1972,
University of Sydney
• Ph.D. in Biochemistry 1978, Monash University,
Melbourne.
• Published over 300 research articles and reviews,
which have been cited over 80,000times
Igor V. Makunin, Phd.
Senior Bioinformatician
QCIF
• Ph.D. in Biology(1996).
• Currently involved in Queensland Cyber
Infrastructure Foundation (QCIF).
• Trained as geneticist and molecular biologist.
• Later switched to comparative genomics and
non-codingRNA.
• Migrate from wet lab to bioinformatics and
analysis of high throughputsequencing.
• Research Interest : Comparative Genomics and
Analysis of High throughput sequencing..
4. Introduction
✓Historically, ncRNAs like rRNAs, tRNAs, snRNAs, and
snoRNAs were thought to have generic cellular functions.
✓Molecular biology's core principle proposed RNA's role as an
intermediary between DNA and protein.
✓Protein-centric view assumed most genetic information is
expressed as proteins, with RNA mainly acting as a messenger.
✓Non-coding sequences in eukaryotes often considered
evolutionarydebris.
✓However, recent insights show extensive transcription of those
inert sequences.
✓RNA demonstrates diverse biological functions beyond
information transfer.
✓RNA, including ncRNAs, emerges as a key player in gene
regulation.
5. Objectives
❑Study DiverseFunctionsof ncRNAs
❑Study role of ncRNAin widespreadtranscription
mechanism
❑Understandfunctional complexityof ncRNAs.
❑Study impact of ncRNAs on characteristicsand diseases.
❑Understandfuture prospectsof study of ncRNAs.
6. Expansion of ncRNA’s and RNA metabolism in
Eukaryotes
✓Prokaryotes have limited small ncRNAs regulating translation/stability
whereas Eukaryotes have abundance of diverse small ncRNAs, co-
expressed with mRNAs released by cleavage after transcription.
✓Archaea and bacteria possess homologs of Argonaute, a family of RNA-
binding endonucleases central to the action of micro- RNAs (miRNAs)
and small interfering RNAs (siRNAs) in Eukaryotes.
✓Prokaryotes genome is dominated by protein-coding sequences (80–
95%) whereas eukaryotes genome dominated by ncRNA .
✓Eukaryotes have more developed RNA processing and signaling systems
linked to sophisticated pathways of gene regulation and complex genetic
phenomena.
✓Large repertoire of RNA-binding proteins, contributing to regulatory
complexity.
✓Eukaryotes utilize RNA as a digital regulatory solution, impacting
developmental programming and species differences.
7. 1. Transcriptional regulation
✓ U1 snRNA regulates binding of RNA Polymerase II with TFIIH to initiate
transcription process.
✓ Also interacts with cyclin H indicating involvement in cell regulation
2. ProgrammedCell Death
✓ Small conserved nuclear RNA 7SK RNA acts with HEXIM1 &2 proteins ; depletion
of this the 7SK shows apoptosis in HeLa cells .
3. Chromatin architecture and Epigenetic memory
✓ Small ncRNA similar to H/ACA snoRNA is component of telomerase; mutation in this
ncRNA results in dominant dyskeratosis congenita.
✓ In human-chicken hybrid cell; mutation in dicer(key component of siRNA/miRNA )
results premature separation of sister chromatids and cell death.
4. Cell biological process
✓ ncRNA 7SL;regulates protein localization; component of SRP; identify signal peptides
of protein)
✓ 13MDA vault complex is huge ribonucleoprotein complex present in cytoplasm
presumed to help in cellular transport.
✓ Vault complex hvg-1 and hvg-2, have a binding affinity for mitoxantrone, a
chemotherapy drug utilized in breast cancer, myeloid leukemia, and non-Hodgkin's
lymphoma treatment.
INFRASTRUCTURAL
ncRNAs
❑ Involved in fundamental cellular
processes like protein synthesis,
RNA splicing & catalytic
activity itself but also found to
have regulatory functions.
❑ Include tRNAs, rRNAs,
spliceosomal uRNAs or
‘snRNAs’ and the common
‘snoRNAs .
8. Cis-Acting regulatory sequences in
Non-Coding regions of mRNAs and
pre-mRNAs
✓Regulatory RNAs base-pair with complementary sequences, forming complexes recognized by generic
infrastructure.
✓UTRs in mRNAs receive trans-acting signals via regulatory RNA sequences, influencing stability, translation,
and localization.
✓Riboswitches bind metabolites, controllingmRNA translation/stability; found in bacteria and eukaryotes.
✓miRNAs influence evolution and regulate mRNA by base sequence recognition.
✓UTR length reflects mRNA regulation sophistication;longer in complex organisms.
✓Cis-acting sequences near splice junctionsinfluence alternative splice site selection.
✓Nucleotide conservation higher around alternative splice sites; complex RNA:RNA interactions affect splicing
control.
✓Some protein-codingsequenceshave dual roles, targeted by regulatory miRNAs and siRNAs.
✓Ultra-conserved sequences at splice sites; proteins may have multifunctionalroles.
✓RNAs combine digital and analog functions; deeper understandingneeded for complex networks.
9. Large numbers of ncRNAs expressed from the mammalian genome
✓ Only about 1.2% of the genome encodes protein-coding
genes, yet as much as 60-70% is transcribed, with both
strands involved. Current estimates are conservative,
considering unexplored cellular contexts.
✓ Mouse genome studies reveal numerous non-coding
transcripts (over 34,000) not encoding proteins,
suggesting vast transcriptional complexity beyond
expectations. Transcriptional depth remains under-
explored, impacting mRNA regulation understanding.
✓ Around 22% of human transcription clusters form sense-
antisense pairs, with considerable evolutionary
conservation. Over 70% of mouse transcriptional units
overlap with opposite-strand transcripts. Sense-antisense
interactions hint at greater transcription extent than
genome size.
✓ Tiling array and MPSS studies identify thousands of non-
coding transcripts in intergenic and intronic regions,
significantly expanding known transcriptomes. Secondary
structure analyses predict functional ncRNAs.
✓ Genome tiling array studies suggest extensive
transcription of non-repetitive sequences in cell-specific
manners, with overlaps between opposite and same
strands, challenging conventional gene and exon
definitions.
✓ RACE analysis confirms intricate networks of
overlapping transcripts and unrecognized exons,
complicating genotype-phenotype correlations and gene
definitions, shaping the view of genes as complex
transcription clusters.
✓ A significant proportion of transcripts in human and
mouse lies within unstudied nuclear polyA+ and polyA−
fractions, revealing that the full extent of the
transcriptome complexity remains largely uncharted.
10. Small Regulatory ncRNAs: snoRNAs (Small Nuclear RNA)
What are SnoRNAs?
✓They are compact RNA molecules, usually
consisting of 60 to 300 building blocks.
✓They serve as guides, pairing with target
RNAs and directing specific chemical
changes.
✓There are two primary types: box C/D
snoRNAs for 2′-O-ribose-methylation and
box H/ACA snoRNAs for
pseudouridylation.
✓Initially thought to modify only ribosomal
RNAs (rRNAs) during ribosome
construction, snoRNAs have since shown
their versatility by influencing various
RNAs, including messenger RNAs
(mRNAs) and small nuclear RNAs
(snRNAs).
How they origin and where they
located ?
✓ Many snoRNAs in mammals are
derived from introns, sections within
genes.
✓ Some human C/D snoRNAs are
independently transcribed,
distinguished by special caps at their
beginning.
✓ A subgroup of H/ACA snoRNAs
resides in small nuclear
compartments known as Cajal
bodies, often called scaRNAs.
✓ Telomerase RNA, which helps
maintain chromosome ends, also
makes appearances in Cajal bodies.
Regulation & Diversity of snoRNAs
✓They have specific roles in certain
tissues or developmental stages,
showcasing their regulatory
functions.
✓ There are also "orphan" snoRNAs
whose purposes remain a mystery.
✓One snoRNA, found in Prader-Willi
syndrome patients, disrupts normal
gene splicing.
✓However, snoRNAs are just the tip
of the iceberg; many more are yet to
be discovered, and this likely
extends to other uncharacterized
small regulatory RNAs waiting to be
unveiled.
11. Small Regulatory ncRNAs: miRNAs/siRNA
✓ MicroRNAs (miRNAs) and small interfering RNAs (siRNAs) are tiny RNA molecules, about 22 units long, derived
from hairpin or double-stranded RNA.
✓ miRNAs can hinder translation via partial matching with target mRNAs, whereas siRNAs can destroy target RNAs
when there's a perfect match, termed RNAi.
✓ About one-third of human protein-coding genes are controlled by miRNAs. siRNAs from repeats help shape silenced
chromatin in chromosome dynamics, especially in yeast.
✓ miRNAs stem from introns and exons of coding and non-coding transcripts produced by RNA polymerase II.
✓ They play central roles in various developmental processes, cell activities, and brain functions.
✓ miRNA dysregulation is tied to diseases, including cancer; miRNA profiling can aid cancer diagnosis.
✓ Some miRNAs act like proto-oncogenes, encouraging tumor growth.
✓ miRNA targets aren't limited to mRNA 3'-UTRs; they can appear anywhere in functional transcripts.
✓ Hundreds of miRNAs are confirmed experimentally, many more predicted computationally.
✓ Known miRNAs are highly conserved, but some evolve quickly, co-varying with targets.
✓ Growing research unveils many new human miRNAs, some species-specific; more miRNAs likely exist.
12. Biological Roles of ncRNA
✓Non-coding RNAs (ncRNAs) have a diverse array of functions, spanning chromosome dynamics,
splicing, RNA editing, translational control, and mRNA degradation. Their reach into gene
regulation across eukaryotes is vast.
✓RNA's involvement in chromatin remodeling and epigenetic memory hints at RNA signaling,
although mechanisms remain uncertain. Transcription's role as a regulator itself or as a product of
transcription interference is debated.
✓Emerging evidence points to ncRNA-guided splicing regulation, influencing splice site selection
and accessibility to splicing machinery.
✓Transcription appears regulated by ncRNAs; RNA polymerase II activity is influenced by ncRNA
signaling. Certain transcription factors and chromatin-modifying proteins exhibit RNA affinity.
✓ncRNAs like steroid receptor RNA activator (SRA) impact hormone receptor activity. Stress
responses involve ncRNAs; B2 and BC200 play roles in heat shock responses.
✓ncRNAs scaffold complex assembly, such as rRNA in ribosomes and 7SL RNA in the SRP
complex. NRON serves as a scaffold for nuclear transcription factor trafficking.
✓ The multifaceted roles of ncRNAs highlight their central place in gene regulation and complex
cellular processes.
13. INTRONS AS SOURCE OF FUNCTIONAL ncRNA
✓Introns might be potential source of regulatory ncRNAs ; operates in tandem with
protein-coding sequences to transmit regulatory cues to other genes & transcripts.
✓Almost all snoRNA & large portion of miRNA in animals encoded from introns.
✓Introns may be processed to smaller RNAs; rather than being discarded after
transcription.
✓In an experiment performed in HeLa cell introducing different intronic sequence in
specific genes showed variations in their activity.
✓Complex organism have more introns, enhancing complexity in gene regulation and
expression.
✓They collaborate with protein-coding parts of genes to send regulatory messages,
and recent discoveries highlight their involvement in gene regulation, contributing to
the complexity of our genetic makeup.
14. Future Avenues for ncRNA Research
✓Expanding Functions
Discover diverse roles of ncRNAs beyond tradition.
✓Therapeutic Potential
Develop ncRNA-based therapies and interventions.
✓Evolutionary Implications
Explore ncRNAs' role in genetic diversity and evolution.
✓Advanced Technologies
Utilize CRISPR and advanced sequencing for precise manipulation.
✓Clinical Applications
Create ncRNA-based diagnostics and disease treatments.
15. CONCLUSION
✓Genetic programming in complex organisms involves an extensive array of non-coding RNAs
(ncRNAs), forming hidden molecular genetic signals that regulate developmental pathways.
✓The abundance of ncRNAs in cells, though diverse in function, mainly contributes to directing
intricate developmental processes, critical in highly structured organisms like humans.
✓The coexistence of a sophisticated RNA-based regulatory system alongside common proteomes
explains the vast diversity observed in complex organisms, resolving the paradox of their distinct
traits.
✓These ncRNAs remained concealed due to their sheer numbers and complex population
characteristics, detected only with advanced methods like sensitive genetic screens, genome
sequencing, and bioinformatics.
✓Rapid evolution of functional ncRNAs challenges the notion of non-functionality; they might instead
adapt easily due to different constraints and positive selection linked to phenotypic variation.
✓Extensive conservation of non-coding sequences, possibly up to 10% of the genome, implies
functionality and challenges traditional gene regulation concepts, while bioinformatics and large-scale
sequencing promise insights into their roles and therapeutic potential.