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histone h2a การใช้

ประโยคมือถือ
  • The core of the histones H2A and H2B can also be modified.
  • This gene encodes a member of the histone H2A family.
  • PRC1 also mono-ubiquitinates histone H2A on lysine 119 ( H2AK119Ub1 ).
  • PRC2 recruits MACROH2A is a replacement for histone H2A that also supports heterochromatin formation.
  • Both CUL4A and its closely related homolog CUL4B may ubiquitinate histones H2A, H3 and H4.
  • The association of the Xi with macro-histone H2A is also disturbed by PNA interference mapping.
  • Kinetochore localization of Sgo1-PP2A is dependent upon phosphorylation on histone H2A of nucleosome, which is the important substrate of spindle checkpoint kinase BUB1.
  • Histone H2A variant H2A . Z is associated with the promoters of actively transcribed genes and also involved in the prevention of the spread of silent heterochromatin.
  • Two copies of histone H2B come together with two copies each of histone H2A, histone H3, and histone H4 to form the octamer core of the nucleosome
  • The other microRNA, miR-155, is regulated both by epigenetic acetylation of histones H2A and H3 at the miR-155 promoter ( where acetylation increases transcription ).
  • To be specific, this HAT can acetylate soluble but not nucleosomal histone H4 at lysines 5 and 12, and, to a lesser degree, histone H2A at lysine 5.
  • BRE is a component of the BRCA1-A complex, which recognizes Lys-63 linked ubiquitinated histones H2A and H2AX DNA lesion sites ( identified using anti-tag coimmunoprecipitation ).
  • The protein encoded by this gene is a subunit of a heterodimer that, along with SUPT16H, forms chromatin transcriptional elongation factor FACT . FACT interacts specifically with histones H2A / H2B to effect nucleosome disassembly and transcription elongation.
  • These changes include histone modifications, such as histone H3 methylation ( i . e . H3K27me3 by PRC2 which is recruited by Xist ) and histone H2A ubiquitination, as well as direct modification of the DNA itself, via the methylation of CpG sites.
  • The guanine nucleotide exchange factor for the small GTPase Ran ( Regulator of chromosome condensation 1 or RCC1 ) is attached to nucleosomes via core histones H2A and H2B . Thus, a gradient of GTP-bound Ran is generated around the vicinity of mitotic chromatin.
  • Transcription of protein-coding genes can be reconstituted on naked DNA with only the general transcription factors and RNA polymerase II . However, this minimal system cannot transcribe DNA packaged into chromatin, indicating that accessory factors may facilitate access to DNA . One such factor, FACT ( facilitates chromatin transcription ), interacts specifically with histones H2A / H2B to effect nucleosome disassembly and transcription elongation.