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Lightly packed form of chromatin that is enriched in genes
Euchromatin (also called "open chromatin") is a lightly packed form of chromatin (DNA, RNA, and protein) that is enriched in genes, and is often (but
Euchromatin
Location of a gene or region on a chromosome
actively-transcribed DNA (euchromatin) or packaged DNA (heterochromatin). They appear differently upon staining (for example, euchromatin appears white and heterochromatin
Locus_(genetics)
Compact and highly condensed form of chromatin
varieties: euchromatin and heterochromatin. Originally, the two forms were distinguished cytologically by how intensely they get stained – the euchromatin is
Heterochromatin
Complex of DNA and protein in eukaryotic cells
Chromosomes are further partitioned into compartments associated with active (euchromatin) or inactive (heterochromatin) chromatin states, and individual chromosomes
Chromatin
DNA molecule containing genetic material of a cell
nanometer fibre which may further condense up to 30 nm fibres. Most of the euchromatin in interphase nuclei appears to be in the form of 30-nm fibers. Chromatin
Chromosome
Photographic display of total chromosome complement in a cell
GC content is usually less condensed, that is, it tends to appear as euchromatin rather than heterochromatin. GC rich DNA tends to contain more coding
Karyotype
Enzymes that catalyze acyl group transfer from acetyl-CoA to histones
acetylation is linked to transcriptional activation and associated with euchromatin. Euchromatin, which is less densely compact, allows transcription factors to
Histone_acetyltransferase
Heterochromatin vs. euchromatin
Constitutive_heterochromatin
Surgical removal of the clitoris
chromosomes Basic concepts Karyotype Ploidy Genetic material/Genome Chromatin Euchromatin Heterochromatin Chromosome Chromatid Nucleosome Nuclear organization
Clitoridectomy
Biological processes used in gene regulation
HDAC activity. Relaxed, transcriptionally active DNA is referred to as euchromatin. More condensed (tightly packed) DNA is referred to as heterochromatin
Histone acetylation and deacetylation
Histone_acetylation_and_deacetylation
Ability of a cell to differentiate into other cell types
therefore more accessible. Euchromatin modifications are also common which is also consistent with the state of euchromatin found in ESCs. Due to their
Cell_potency
envelope with nuclear pores. Chromatin is loosely packed and consists of euchromatin. Panel (B) human VSELs are small and similarly as murine VSELs possess
Very small embryonic-like stem cells
Very_small_embryonic-like_stem_cells
Ability to see in low light conditions
inverted rods have heterochromatin in the center of their nuclei and euchromatin and other transcription factors along the border. In addition, the outer
Night_vision
Organelle in eukaryotic cells
instead located in the mitochondria. There are two types of chromatin. Euchromatin is the less compact DNA form, and contains genes that are frequently
Cell_nucleus
Type of enzymes
and open histone conformation, euchromatin, or a tight and closed histone conformation, heterochromatin. Euchromatin marks active transcription and gene
Histone-modifying_enzymes
Conversion of a gene's sequence into a mature gene product or products
access to DNA with significant impacts on the expression of genes in euchromatin and heterochromatin areas. Gene expression in mammals is regulated by
Gene_expression
sequences prevent the heterochromatic region from spreading into the euchromatin but they are no longer present in the flies that inherit certain chromosomal
Position-effect_variegation
Process of copying a segment of DNA into RNA
in the nucleus, in discrete sites called transcription factories or euchromatin. Such sites can be visualized by allowing engaged polymerases to extend
Transcription_(biology)
Transformation of a stem cell to a more specialized cell
bound and usually, but not always, transcriptionally active, called euchromatin. The epigenetic processes of histone methylation and acetylation, and
Cellular_differentiation
Biological phenomenon
The adult cells have one set of inactive H chromosomes and one set of euchromatin E chromosomes. These H chromosomes are eliminated from the sperm during
Pseudo-arrhenotoky
Sex chromosome present in both sexes in the XY and X0 sex-determination systems
alignments. The X chromosome is notably larger and has a more active euchromatin region than its Y chromosome counterpart. Further comparison of the X
X_chromosome
Species of virus
associating domains (TADs), although the broader separation between euchromatin and heterochromatin compartments is largely maintained. HSV evades the
Herpes_simplex_virus
Blocks of DNA
regions. Interstitial region segmental duplications are distributed on the euchromatin between the pericentromeric and subtelomeric regions. They account for
Segmental duplication on the human Y chromosome
Segmental_duplication_on_the_human_Y_chromosome
Telomeric repeat-containing RNA
the CST Complex. TERRA can also regulate telomere length by increasing euchromatin formation. On the other hand, nonsense-mediated decay factor enrichment
TERRA_(biology)
Plastic surgery performed on the genitals
chromosomes Basic concepts Karyotype Ploidy Genetic material/Genome Chromatin Euchromatin Heterochromatin Chromosome Chromatid Nucleosome Nuclear organization
Genitoplasty
Protein family
single nucleosome level, gene repression by heterochromatization of euchromatin, and DNA repair. HP1 proteins are fundamental units of heterochromatin
Heterochromatin_protein_1
Technique in genetics
generally stain darkly in G-banding. In contrast, less condensed chromatin (euchromatin)—which tends to be rich with guanine and cytosine (GC-rich DNA) and more
G_banding
Medical condition
29271/jcpsp.2022.Supp1.S76 Kleefstra, T (2005). "Disruption of the gene Euchromatin Histone Methyl Transferase1 (Eu-HMTase1) is associated with the 9q34
Kleefstra_syndrome
Form of dynamic modification
heterochromatin migrates to the center of the nucleus and displaces euchromatin and facultative heterochromatin to regions at the edge of the nucleus
Chromatin_remodeling
Specialized DNA sequence of a chromosome that links a pair of sister chromatids
with genome-wide centromere-specific repeat arrays interspersed among euchromatin". Proceedings of the National Academy of Sciences of the United States
Centromere
division Equivalence group Erythrocytes Escherichia coli Ethics Ethidium Euchromatin Eugenics Eukaryote Eukaryotic cell Euploid Euploidy European Journal
Index_of_genetics_articles
that correlated with linear arrangement of genes, suggesting the terms euchromatin and heterochromatin for differences detectable by suitable chromosomal
Emil_Heitz
Family of proteins that form microfilaments
Translocation of the activated chromosome fragment from under membrane region to euchromatin where transcription starts. This movement requires the interaction of
Actin
Protein
transcription factor binding histone methyltransferase activity (H3-K4 specific) euchromatin binding Cellular component chromosome nucleus histone methyltransferase
SETD1A
Form taken by the inactive X chromosome in a female somatic cell
chromatin during mitosis. Heitz distinguished between heterochromatin and euchromatin, noting that certain regions of some chromosomes (and in some instances
Barr_body
Visual Depiction of Chromatin as Euchromatin and Heterochromatin.
Epigenetic regulation of neurogenesis
Epigenetic_regulation_of_neurogenesis
Protein-coding gene in the species Homo sapiens
novel Dnmt3a isoform produced from an alternative promoter localizes to euchromatin and its expression correlates with active de novo methylation". The Journal
DNA (cytosine-5)-methyltransferase 3A
DNA_(cytosine-5)-methyltransferase_3A
Oncogenic protein
recruit the BAF complex. These interactions change heterochromatin to euchromatin at EWS/FLI1 DNA-binding sites effectively generating de novo enhancers
EWS/FLI
heterochromatin, an inactive form of chromatin, while acetylation often marks euchromatin, an active form of chromatin. In EBV, The amount and location of the
Epigenetics of human herpesvirus latency
Epigenetics_of_human_herpesvirus_latency
Mammalian protein found in Homo sapiens
polymerase DNA polymerase activity Cellular component nucleus nucleoplasm euchromatin nuclear matrix cytoplasm cytosol Biological process DNA metabolic process
Terminal deoxynucleotidyl transferase
Terminal_deoxynucleotidyl_transferase
Genetic boundary element that blocks the interaction between enhancers and promoters
promoter of neighbouring genes Barrier insulators prevent silencing of euchromatin by inhibiting the spread of neighbouring heterochromatin While enhancer-blocking
Insulator_(genetics)
Region of DNA in a eukaryotic chromosome
and transcription to take place. Active chromatin may also be called euchromatin. ACSs may occur in non-expressed gene regions which are assumed to be
Active_chromatin_sequence
Compounds that inhibit histone deacetylases
histones leading to a less compact and more transcriptionally active euchromatin, and, on the converse, the actions of histone deacetylases (HDAC), which
Histone_deacetylase_inhibitor
It is a mammalian homologue of Drosophila Polycomb. It localises to euchromatin within interphase nuclei, but it is enriched within the centromeric heterochromatin
M33_(gene)
Inactivation of copies of X chromosome
heterochromatin, such as the Xi, is more condensed than DNA packaged in euchromatin, such as the Xa. The inactive X forms a discrete body within the nucleus
X-inactivation
Muscular degenerative disease of the face, shoulder blades, and upper arms
containing both heterochromatin and euchromatin structures. In FSHD, the heterochromatin structure is lost, becoming euchromatin, which consists of less methylation
Facioscapulohumeral muscular dystrophy
Facioscapulohumeral_muscular_dystrophy
Protein-coding gene in humans
chromatin binding protein binding Cellular component heterochromatin euchromatin PcG protein complex PRC1 complex nucleus nucleoplasm chromosome Biological
Chromobox_2
Overview article
global acetylation is examined at H3K4, which is associated with active euchromatin. The mammalian zygotic genome undergoes active and passive global cytosine
Epigenetics in stem-cell differentiation
Epigenetics_in_stem-cell_differentiation
Protein-coding gene in humans
JH, Skalnik DG (2003). "CpG-binding protein is a nuclear matrix- and euchromatin-associated protein localized to nuclear speckles containing human trithorax
CXXC1
Species of fly
Berendes; H. G. Keyl (1967). "Distribution of DNA in Heterochromatin and Euchromatin of Polytene Nuclei of Drosophila hydei". Genetics. 57 (1): 1–13. doi:10
Drosophila_hydei
Medical condition
High-grade carcinoma typically displays more pleomorphism, multiple mitoses, euchromatin and relatively prominent nucleoli, and uneven distribution of nuclei
Transitional_cell_carcinoma
Immune cells that responds to any antigen
stimulation of the neutrophil response, neutrophils lose their shape, allowing euchromatin and heterochromatin to homogenize, later resulting in the mixing of NET
Nonspecific_immune_cell
Protein-coding gene in the species Homo sapiens
Nillesen WM, Magee A, et al. (August 2006). "Loss-of-function mutations in euchromatin histone methyl transferase 1 (EHMT1) cause the 9q34 subtelomeric deletion
EHMT1
Protein-coding gene in the species Homo sapiens
putative nuclear receptor mediator TIF1alpha is tightly associated with euchromatin". J. Cell Sci. 112 (11): 1671–83. doi:10.1242/jcs.112.11.1671. PMID 10318760
TRIM24
Interactions between nucleic acid modules
transcription factors cannot access wound DNA- This is in contrast to euchromatin, which is decondensed, and therefore, readily accessible to the transcriptional
Nucleic acid quaternary structure
Nucleic_acid_quaternary_structure
Protein-coding gene in the species Homo sapiens
PML body intracellular membrane-bounded organelle cytoplasm cytosol euchromatin myofibril nucleus sarcomere I band Biological process negative regulation
ANKRD2
Undesirable occurrence in eukaryotic cells
replicated in late S phase, as they are more difficult to access than euchromatin. Epigenetic factors also have a large influence on what gets replicated
DNA_re-replication
Genomic analysis technique
are more specifically defined to represent the gene-dense regions of euchromatin, while type B compartments represent heterochromatic regions with less
Hi-C (genomic analysis technique)
Hi-C_(genomic_analysis_technique)
Single-cell sequencing technology
chromatin with sequencing (scATAC-seq), which only targets active euchromatin, scGET-seq is also capable of probing inactive heterochromatin. This
ScGET-seq
Word, phrase or sentence with no repeated letter
discrepantly disreputably doublethinks drumbeatings earthmovings edulcorating euchromatins exclusionary exculpations expurgations exhaustingly farsightedly flexographic
Heterogram_(literature)
Species of tree
(human genome: 3 billion base pairs) Proportion of heterochromatin to euchromatin: 3:7 Number of chromosomes: 19 Number of putative genes: 45,555, the
Populus_trichocarpa
Protein-coding gene in the species Homo sapiens
endogenous reactions. Such DNA repair occurs in heterochromatin as well as in euchromatin. Mutations in this gene cause Athabascan-type severe combined immunodeficiency
Artemis_(protein)
where centric heterochromatin and centromeres have formed on originally euchromatin domains lacking alpha satellite DNA; this usually happens as a result
Centric_heterochromatin
Molecular biology sequencing technique
how accessible the DNA is, regions of chromatin can be classified as euchromatin or heterochromatin . This complex primary chromatin architecture of cis-regulatory
Fiber-Seq
Protein-coding gene in the species Homo sapiens
protein binding transferase activity zinc ion binding Cellular component euchromatin sex chromatin ubiquitin ligase complex nucleoplasm chromosome heterochromatin
RNF2
while the same gene is transcribed at a much higher rate when located in euchromatin. Proximity to promoters, enhancers, and other regulatory elements, as
Glossary of genetics and evolutionary biology
Glossary_of_genetics_and_evolutionary_biology
Basic structural unit of DNA packaging in eukaryotes
loops along a central protein scaffold to form transcriptionally active euchromatin. Further compaction leads to transcriptionally inactive heterochromatin
Nucleosome
Spatial distribution of chromatin within a cell nucleus
histones used can determine local chromatin structure. For example, euchromatin is a form of chromatin with low nucleosome concentration - here, the
Nuclear_organization
CTCF binding to DNA may result in formation of transcription-ready euchromatin through the Histone H3-acetylating activity which results due to CTCF
HHV latency associated transcript
HHV_latency_associated_transcript
Type of modification to a cell's epigenome
chromatin state from heterochromatin (tightly bound and inaccessible) to euchromatin (loosely bound and fully accessible), which leads to an increased transcription
Epigenetic_priming
Protein-coding gene in the species Homo sapiens
Nakao M (1999). "Methylation-Mediated Transcriptional Silencing in Euchromatin by Methyl-CpG Binding Protein MBD1 Isoforms". Mol. Cell. Biol. 19 (9):
MBD1
Protein-coding gene in humans
S2CID 29392124. Minc E, Courvalin JC, Buendia B (2001). "HP1gamma associates with euchromatin and heterochromatin in mammalian nuclei and chromosomes". Cytogenet.
CBX3
Method in molecular biology
"chromosome". In 1928, Emil Heitz coined the terms heterochromatin and euchromatin. In 1942, Conrad Waddington postulated the epigenetic landscapes. In
Chromosome conformation capture
Chromosome_conformation_capture
Protein-coding gene in the species Homo sapiens
transferase activity zinc ion binding histone binding Cellular component euchromatin nuclear matrix replication fork heterochromatin nucleus Biological process
UHRF1
Field of study
resulting in facultative heterochromatin or, even further derepressed, euchromatin). At its most repressive state, involving many folds into itself and
Epigenetics of neurodegenerative diseases
Epigenetics_of_neurodegenerative_diseases
American biologist
a variegating phenotype, whereas when the P element is inserted into euchromatin the fly eyes show a red phenotype; this phenomenon is known as Position-Effect
Sarah_Elgin
Protein-coding gene in the species Homo sapiens
component heterochromatin preribosome, small subunit precursor cytosol euchromatin nucleolus nucleus preribosome, large subunit precursor granular component
RRP1B
Multiprotein complex involved in transcription in eukaryotes
looping. Enhancer RNAs (eRNAs) can function similarly. In addition to euchromatin looping, Mediator helps form or maintain heterochromatin at centromeres
Mediator_(coactivator)
RNA-based gene silencing process
participate in RdDM are also listed. Different chromatin states, like active euchromatin or silent heterochromatin, are defined by a combination of specific histone
RNA-directed_DNA_methylation
DNA segments
Subtelomeres are responsible to block heterochromatin from getting into the euchromatin region. Subtelomeres can mitigate the effects of heterochromatin invasion
Subtelomere
American geneticist
of epigenetic regulatory mechanisms in which: viral proteins promote euchromatin modifications on viral chromatin and transcription of lytic genes in
David_M._Knipe
Protein found in humans
chromatin exhibits a histone modification pattern that is distinct from both euchromatin and heterochromatin". Nature Structural & Molecular Biology. 11 (11):
Centromere_protein_A
One of the five main histone proteins involved in the structure of chromatin
also has roles in transcriptional activation and the maintenance of euchromatin. Additional acetylations include K31ac and K79ac. H4S1p H4R3me2 H4K5ac
Histone_H4
other two stop codons are named amber and ochre. open chromatin See euchromatin. open reading frame (ORF) The part of a reading frame that has the ability
Glossary of cellular and molecular biology (M–Z)
Glossary_of_cellular_and_molecular_biology_(M–Z)
Non-coding RNA in the species Homo sapiens
Xist on the future active female X chromosome to maintain the active euchromatin state of the chosen chromosome. In the extra-embryonic lineage in mice
Tsix
which is recognized by a different antibody. ergosome See polysome. euchromatin A relatively open, lightly compacted form of chromatin in which DNA is
Glossary of cellular and molecular biology (0–L)
Glossary_of_cellular_and_molecular_biology_(0–L)
German neuroscientist
manipulate the state of DNA, which can be either open, referred to as euchromatin or closed, referred to as heterochromatin. Later in her postdoc, Schafer
Anne_Schaefer_(scientist)
Mammalian protein found in humans
differentiation involved in prostate gland development regulation of euchromatin binding hair follicle morphogenesis hair follicle placode formation neuron
Catenin_beta-1
Transcription is heterocatalytic function of DNA
or globally "condensed" and transcriptionally inactive. The former (euchromatin) is lightly packed and rich in genes under active transcription. The
Eukaryotic_transcription
One of the five main histone proteins
protein recruitment, histone H2AX phosphorylation and relocation to euchromatin". Nucleic Acids Research. 39 (15): 6489–99. doi:10.1093/nar/gkr230. PMC 3159438
Histone_H2A
Random variability in quantities arising in cellular biology
chromatin that can be roughly classified into "open" (also known as euchromatin) or "closed" (also known as heterochromatin). Open chromatin leads to
Cellular_noise
Protein domain
which is linked to gene silencing. However, they can also be present in euchromatin, where genes are actively transcribed. Chromodomains are rarely found
Chromodomain
envelope 1.a. Outer membrane 1.b. Inner membrane 2. Nucleolus 3. Nucleoplasm 4. Chromatin 4.a. Heterochromatin 4.b. Euchromatin 5. Ribosome 6. Nuclear pore
Interchromatin_granule
epigenetic dynamics by single-cell profiling of heterochromatin and euchromatin". Nature Biotechnology. 40 (2): 235–244. doi:10.1038/s41587-021-01031-1
List of single cell omics methods
List_of_single_cell_omics_methods
The following is a partial list of the "D" codes for Medical Subject Headings (MeSH), as defined by the United States National Library of Medicine (NLM)
List_of_MeSH_codes_(D12.776)
Histone acetylation on tail of histone H4
also has roles in transcriptional activation and the maintenance of euchromatin. H4K16ac is unusual in that it is associated with both transcriptional
H4K16ac
Protein-coding gene
conversion of heterochromatin, which is very difficult to access, to euchromatin, which can be easily accessed by transcriptional proteins and enzymes
GLIS1
Class of enzymes
residues H3K4, H3K36, and H3K79 is associated with transcriptionally active euchromatin. Depending on the site and symmetry of methylation, methylated arginines
Histone_methyltransferase
Protein-coding gene in the species Homo sapiens
STAT family protein binding Cellular component cytoplasm pronucleus euchromatin heterochromatin nucleus centrosome cytosol PML body nuclear stress granule
Heat_shock_factor_protein_1
Protein-coding gene in the species Homo sapiens
J, Turner BM, Schubert I (November 2000). "Histone H4 acetylation of euchromatin and heterochromatin is cell cycle dependent and correlated with replication
JADE1
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