P84233 (H32_XENLA) Reviewed, UniProtKB/Swiss-Prot
Last modified November 13, 2013. Version 79. History...
Names and origin
|Sequence length||136 AA.|
|Sequence processing||The displayed sequence is further processed into a mature form.|
|Protein existence||Evidence at protein level|
General annotation (Comments)
Core component of nucleosome. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling.
The nucleosome is a histone octamer containing two molecules each of H2A, H2B, H3 and H4 assembled in one H3-H4 heterotetramer and two H2A-H2B heterodimers. The octamer wraps approximately 147 bp of DNA.
Expressed during S phase, then expression strongly decreases as cell division slows down during the process of differentiation.
Acetylation is generally linked to gene activation. Acetylation on Lys-19 (H3K18ac) and Lys-24 (H3K24ac) favors methylation at Arg-18 (H3R17me). Acetylation at Lys-123 (H3K122ac) by EP300/p300 plays a central role in chromatin structure: localizes at the surface of the histone octamer and stimulates transcription, possibly by promoting nucleosome instability By similarity.
Methylation at Lys-5 (H3K4me), Lys-37 (H3K36me) and Lys-80 (H3K79me) are linked to gene activation. Methylation at Lys-5 (H3K4me) facilitates subsequent acetylation of H3 and H4. Methylation at Lys-80 (H3K79me) is associated with DNA double-strand break (DSB) responses and is a specific target for tp53bp1. Methylation at Lys-10 (H3K9me) and Lys-28 (H3K27me) are linked to gene repression. Methylation at Lys-10 (H3K9me) is a specific target for HP1 proteins (cbx1, cbx3 and cbx5) and prevents subsequent phosphorylation at Ser-11 (H3S10ph) and acetylation of H3 and H4. Methylation at Lys-5 (H3K4me) and Lys-80 (H3K79me) require preliminary monoubiquitination of H2B at 'Lys-120' By similarity. Ref.4
Phosphorylated at Thr-4 (H3T3ph) by gsg2/haspin during prophase and dephosphorylated during anaphase. Phosphorylation at Ser-11 (H3S10ph) by aurkb is crucial for chromosome condensation and cell-cycle progression during mitosis and meiosis. In addition phosphorylation at Ser-11 (H3S10ph) by rps6ka4 and rps6ka5 is important during interphase because it enables the transcription of genes following external stimulation, like mitogens, stress, growth factors or UV irradiation and result in the activation of genes, such as c-fos and c-jun. Phosphorylation at Ser-11 (H3S10ph), which is linked to gene activation, prevents methylation at Lys-10 (H3K9me) but facilitates acetylation of H3 and H4. Phosphorylation at Ser-11 (H3S10ph) by aurkb mediates the dissociation of HP1 proteins (cbx1, cbx3 and cbx5) from heterochromatin. Phosphorylation at Ser-11 (H3S10ph) is also an essential regulatory mechanism for neoplastic cell transformation. Phosphorylated at Ser-29 (H3S28ph) by mltk isoform 1, rps6ka5 or aurkb during mitosis or upon ultraviolet B irradiation. Phosphorylation at Thr-7 (H3T6ph) by prkcb is a specific tag for epigenetic transcriptional activation that prevents demethylation of Lys-5 (H3K4me) by lsd1/kdm1a. At centromeres, specifically phosphorylated at Thr-12 (H3T11ph) from prophase to early anaphase, by dapk3 and pkn1. Phosphorylation at Thr-12 (H3T11ph) by pkn1 is a specific tag for epigenetic transcriptional activation that promotes demethylation of Lys-10 (H3K9me) by kdm4c/jmjd2c. Phosphorylation at Tyr-42 (H3Y41ph) by jak2 promotes exclusion of cbx5 (HP1 alpha) from chromatin By similarity. Ref.4
Monoubiquitinated by rag1 in lymphoid cells, monoubiquitination is required for V(D)J recombination By similarity.
Lysine deamination at Lys-5 (H3K4all) to form allysine only takes place on H3K4me3 and results in gene repression By similarity.
Belongs to the histone H3 family.
|Gene Ontology (GO)|
Inferred from electronic annotation. Source: InterPro
Inferred from electronic annotation. Source: UniProtKB-KWnucleus
Inferred from electronic annotation. Source: UniProtKB-SubCell
Inferred from electronic annotation. Source: UniProtKB-KW
|Complete GO annotation...|
Sequence annotation (Features)
|Feature key||Position(s)||Length||Description||Graphical view||Feature identifier|
|Initiator methionine||1||1||Removed By similarity|
|Chain||2 – 136||135||Histone H3.2||PRO_0000221265|
Amino acid modifications
|Modified residue||3||1||Asymmetric dimethylarginine; by PRMT6 By similarity|
|Modified residue||4||1||Phosphothreonine; by GSG2 By similarity|
|Modified residue||5||1||Allysine; alternate By similarity|
|Modified residue||5||1||N6,N6,N6-trimethyllysine; alternate Ref.4|
|Modified residue||5||1||N6,N6-dimethyllysine; alternate Ref.4|
|Modified residue||5||1||N6-acetyllysine; alternate By similarity|
|Modified residue||5||1||N6-methyllysine; alternate Ref.4|
|Modified residue||7||1||Phosphothreonine; by PKC By similarity|
|Modified residue||10||1||N6-methylated lysine Ref.4|
|Modified residue||11||1||Phosphoserine; by AURKB, AURKC, RPS6KA3, RPS6KA4 and RPS6KA5 By similarity|
|Modified residue||12||1||Phosphothreonine; by PKC By similarity|
|Modified residue||15||1||N6-acetyllysine Ref.4|
|Modified residue||18||1||Asymmetric dimethylarginine Ref.4|
|Modified residue||19||1||N6-acetyllysine; alternate By similarity|
|Modified residue||19||1||N6-methylated lysine; alternate By similarity|
|Modified residue||24||1||N6-acetyllysine By similarity|
|Modified residue||28||1||N6-acetyllysine; alternate By similarity|
|Modified residue||28||1||N6-methylated lysine; alternate By similarity|
|Modified residue||29||1||Phosphoserine; by AURKB, AURKC and RPS6KA5 By similarity|
|Modified residue||37||1||N6-acetyllysine; alternate By similarity|
|Modified residue||37||1||N6-methylated lysine; alternate By similarity|
|Modified residue||42||1||Phosphotyrosine By similarity|
|Modified residue||58||1||Phosphoserine By similarity|
|Modified residue||65||1||N6-methylated lysine By similarity|
|Modified residue||80||1||N6-methylated lysine By similarity|
|Modified residue||81||1||Phosphothreonine By similarity|
|Modified residue||116||1||N6-acetyllysine By similarity|
|Modified residue||123||1||N6-acetyllysine; alternate By similarity|
|Modified residue||123||1||N6-methyllysine; alternate By similarity|
Helix Strand Turn
|Beta strand||7 – 10||4|
|Beta strand||19 – 21||3|
|Beta strand||27 – 29||3|
|Beta strand||31 – 34||4|
|Helix||46 – 57||12|
|Helix||65 – 77||13|
|Beta strand||80 – 82||3|
|Helix||87 – 114||28|
|Beta strand||118 – 120||3|
|Helix||122 – 131||10|
|Turn||132 – 135||4|
|||"Individual Xenopus histone genes are replication-independent in oocytes and replication-dependent in Xenopus or mouse somatic cells."|
Old R.W., Sheikh S.A., Chambers A., Newton C.A., Mohammed A., Aldridge T.C.
Nucleic Acids Res. 13:7341-7358(1985) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
|||"Genomic organization and nucleotide sequence of two distinct histone gene clusters from Xenopus laevis. Identification of novel conserved upstream sequence elements."|
Perry M., Thomsen G.H., Roeder R.G.
J. Mol. Biol. 185:479-499(1985) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] (GENE CLUSTERS X1H1 AND X1H3).
|||NIH - Xenopus Gene Collection (XGC) project|
Submitted (MAR-2007) to the EMBL/GenBank/DDBJ databases
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
|||"Involvement of histone methylation and phosphorylation in regulation of transcription by thyroid hormone receptor."|
Li J., Lin Q., Yoon H.-G., Huang Z.-Q., Strahl B.D., Allis C.D., Wong J.
Mol. Cell. Biol. 22:5688-5697(2002) [PubMed] [Europe PMC] [Abstract]
Cited for: METHYLATION AT LYS-5; LYS-10 AND ARG-18, PHOSPHORYLATION AT SER-11, ACETYLATION AT LYS-15.
|||"Solvent mediated interactions in the structure of the nucleosome core particle at 1.9 A resolution."|
Davey C.A., Sargent D.F., Luger K., Maeder A.W., Richmond T.J.
J. Mol. Biol. 319:1097-1113(2002) [PubMed] [Europe PMC] [Abstract]
Cited for: X-RAY CRYSTALLOGRAPHY (1.9 ANGSTROMS) IN COMPLEX WITH H2A; H2B AND H4.
|+||Additional computationally mapped references.|
|X03104 Genomic DNA. Translation: CAA26890.1.|
X03017 Genomic DNA. Translation: CAA26813.1.
X03018 Genomic DNA. Translation: CAA26818.1.
M21286 Genomic DNA. Translation: AAA49765.1.
M21287 Genomic DNA. Translation: AAA49770.1.
BC133776 mRNA. Translation: AAI33777.1.
|PIR||HSXL31. A93596. |
|RefSeq||NP_001091428.1. NM_001097959.1. |
3D structure databases
|SMR||P84233. Positions 17-136. |
Protein-protein interaction databases
|IntAct||P84233. 4 interactions.|
Protocols and materials databases
Genome annotation databases
|Xenbase||XB-GENE-866635. hist2h3c. |
Family and domain databases
|Gene3D||188.8.131.52. 1 hit. |
|InterPro||IPR009072. Histone-fold. |
|PANTHER||PTHR11426. PTHR11426. 1 hit. |
|Pfam||PF00125. Histone. 1 hit. |
|PRINTS||PR00622. HISTONEH3. |
|SMART||SM00428. H3. 1 hit. |
|SUPFAM||SSF47113. SSF47113. 1 hit. |
|PROSITE||PS00322. HISTONE_H3_1. 1 hit. |
PS00959. HISTONE_H3_2. 1 hit.
|Accession||Primary (citable) accession number: P84233|
Secondary accession number(s): A4FVE2 P17320
|Entry status||Reviewed (UniProtKB/Swiss-Prot)|
|Annotation program||Chordata Protein Annotation Program|