Tag: Gene regulation

Epigenetic reprogramming resets and establishes gene-regulatory states through changes in DNA methylation, histone modifications, chromatin structure, and other epigenetic mechanisms. Learn about its role in germ cells, embryonic development, stem cells, inheritance, aging, cancer, and human genetics.

Epigenetic inheritance describes the maintenance or transmission of gene-regulatory information without changing the DNA sequence. Learn about DNA methylation, histone modifications, genomic imprinting, X-chromosome inactivation, epigenetic reprogramming, and disease.

X-chromosome inactivation is an epigenetic process that regulates X-linked gene dosage by silencing much of one X chromosome. Learn about XIST, XCI mechanisms, Barr bodies, escape genes, skewed XCI, mosaicism, and genetic disorders.

RNA is a versatile nucleic acid involved in gene expression, protein synthesis, regulation, and catalysis. Explore RNA structure, nucleotide composition, base pairing, folding, RNA types, processing, and biological functions.

Epigenetic mutations and changes alter gene regulation without necessarily changing the DNA sequence. Learn about DNA methylation, histone modifications, chromatin remodeling, gene expression, disease, cancer, and epigenetic testing.

Regulatory mutations alter DNA regions that control gene expression. Learn about promoter, enhancer, silencer, and other regulatory mutations and their effects on genes, development, genetic disorders, and cancer.

Constitutive and facultative heterochromatin are two forms of condensed chromatin with distinct properties and functions. Compare their stability, gene activity, genomic locations, epigenetic marks, and roles in chromosome organization and gene regulation.

Heterochromatin is a relatively compact form of chromatin associated with reduced DNA accessibility and transcriptional activity. Learn about constitutive and facultative heterochromatin, histone modifications, DNA methylation, chromosome organization, gene regulation, and genome stability.

Euchromatin is a relatively open and accessible form of chromatin associated with active or potentially active genes. Learn about its structure, histone modifications, chromatin accessibility, gene regulation, DNA replication, cell differentiation, and relationship with heterochromatin.

Mutually exclusive exons are a specialized form of alternative RNA splicing in which a mature RNA transcript contains one exon from a pair or group while excluding the others. This mechanism allows cells to regulate gene expression and generate different RNA transcripts and protein isoforms from the same gene.

Exon skipping is a form of alternative RNA splicing in which one or more exons are excluded from mature mRNA. Learn how splice sites, splicing factors, and regulatory elements control exon inclusion and skipping and how this process affects gene expression and protein diversity.

Splicing enhancers and silencers are regulatory RNA elements that help control which splice sites are used during RNA splicing. By interacting with splicing factors and the spliceosome, they influence exon inclusion, exon skipping, alternative splicing, and gene expression.

Splice sites are RNA sequence signals that guide the spliceosome during intron removal and exon joining. Learn about 5′ and 3′ splice sites, branch points, splicing factors, mutations, and alternative splicing.

Splicing factors are proteins that regulate RNA splicing by influencing splice-site selection and spliceosome activity. Learn how they control alternative splicing, gene expression, development, and disease.

The spliceosome is a complex molecular machine that removes introns and joins exons during RNA splicing. Learn about its components, assembly, function, alternative splicing, gene regulation, mutations, and role in disease.