Q91YE5 (BAZ2A_MOUSE) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 101.
History...
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Bromodomain adjacent to zinc finger domain protein 2A Alternative name(s): Transcription termination factor I-interacting protein 5 Short name=TTF-I-interacting protein 5 Short name=Tip5 | ||||
| Gene names |
| ||||
| Organism | Mus musculus (Mouse) [Reference proteome] | ||||
| Taxonomic identifier | 10090 [NCBI] | ||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Sciurognathi › Muroidea › Muridae › Murinae › Mus › Mus![]() |
Protein attributes
| Sequence length | 1889 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Essential component of the NoRC (nucleolar remodeling complex) complex, a complex that mediates silencing of a fraction of rDNA by recruiting histone-modifying enzymes and DNA methyltransferases, leading to heterochromatin formation and transcriptional silencing. In the complex, it plays a central role by being recruited to rDNA and by targeting chromatin modifying enzymes such as HDAC1, leading to repress RNA polymerase I transcription. Recruited to rDNA via its interaction with TTF1 and its ability to recognize and bind histone H4 acetylated on 'Lys-16' (H4K16ac), leading to deacetylation of H4K5ac, H4K8ac, H4K12ac but not H4K16ac. Specifically binds pRNAs, 150-250 nucleotide RNAs that are complementary in sequence to the rDNA promoter; pRNA-binding is required for heterochromatin formation and rDNA silencing. Ref.2 Ref.4 Ref.6 |
| Subunit structure | Component of the NoRC complex, at least composed of SMARCA5/SNF2H and BAZ2A/TIP5. Interacts with TTF1; required for recruitment of the NoRC complex to rDNA. Interacts with DNMT1, DNM3B, HDAC1 and SIN3A. Ref.2 Ref.4 Ref.5 Ref.6 |
| Subcellular location | Nucleus › nucleolus. Note: Colocalizes with the basal RNA polymerase I transcription factor UBF in the nucleolus. Ref.2 Ref.4 Ref.6 Ref.9 Ref.10 |
| Domain | The bromo domain and the PHD-type zinc finger recognize and bind histone H4 acetylated on 'Lys-16' (H4K16ac). These 2 domains play a central role in the recritment of chromatin silencing proteins such as DNMT1, DNMT3B and HDAC1. Ref.6 Ref.7 The MBD (methyl-CpG-binding) domain, also named TAM domain, specifically recognizes and binds a conserved stem-loop structure the association within pRNA. Binding to pRNA induces a conformational change of BAZ2A/TIP5 and is essential for targeting the NoRC complex to the nucleolus. Ref.6 Ref.7 |
| Post-translational modification | Acetylation at Lys-672 by KAT8/MOF promotes its dissociation from pRNA, affecting heterochromatin formation, nucleosome positioning and rDNA silencing. Deacetylation by SIRT1 in late S phase enhances pRNA-binding, allowing de novo DNA methylation and heterochromatin formation. Acetylation is high during S phase and declines to background levels in late S phase when the silent copies of rRNA genes are replicated. |
| Sequence similarities | Belongs to the WAL family. Contains 4 A.T hook DNA-binding domains. Contains 1 bromo domain. Contains 1 DDT domain. Contains 1 MBD (methyl-CpG-binding) domain. Contains 1 PHD-type zinc finger. |
Ontologies
Alternative products
| This entry describes 3 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform 1 (identifier: Q91YE5-1) This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. | ||||||
| Isoform 2 (identifier: Q91YE5-2) The sequence of this isoform differs from the canonical sequence as follows: 1712-1712: Missing. | ||||||
| Note: No experimental confirmation available. | ||||||
| Isoform 3 (identifier: Q91YE5-3) The sequence of this isoform differs from the canonical sequence as follows: 305-305: L → LA | ||||||
| Note: No experimental confirmation available. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 1889 | 1889 | Bromodomain adjacent to zinc finger domain protein 2A | PRO_0000211173 | |||||
Regions | |||||||||
| Domain | 538 – 609 | 72 | MBD | ||||||
| Domain | 839 – 904 | 66 | DDT | ||||||
| Domain | 1794 – 1864 | 71 | Bromo | ||||||
| DNA binding | 641 – 653 | 13 | A.T hook 1 | ||||||
| DNA binding | 662 – 674 | 13 | A.T hook 2 | ||||||
| DNA binding | 1176 – 1188 | 13 | A.T hook 3 | ||||||
| DNA binding | 1390 – 1402 | 13 | A.T hook 4 | ||||||
| Zinc finger | 1662 – 1712 | 51 | PHD-type | ||||||
| Coiled coil | 686 – 813 | 128 | Potential | ||||||
| Compositional bias | 652 – 777 | 126 | Lys-rich | ||||||
| Compositional bias | 1045 – 1051 | 7 | Poly-Glu | ||||||
Amino acid modifications | |||||||||
| Modified residue | 134 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 501 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 672 | 1 | N6-acetyllysine; by KAT8 Ref.10 | ||||||
| Modified residue | 1042 | 1 | Phosphoserine Ref.8 | ||||||
| Modified residue | 1383 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 1545 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 1733 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 1755 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 1767 | 1 | Phosphoserine By similarity | ||||||
Natural variations | |||||||||
| Alternative sequence | 305 | 1 | L → LA in isoform 3. | VSP_037962 | |||||
| Alternative sequence | 1712 | 1 | Missing in isoform 2. | VSP_037963 | |||||
Experimental info | |||||||||
| Mutagenesis | 570 – 571 | 2 | WY → GA: Impairs interaction with pRNA and heterochromatin formation but retains ability to trigger DNA methylation and silence rDNA transcription. Ref.7 | ||||||
| Mutagenesis | 672 | 1 | K → R: Abolishes acetylation by KAT8/MOF, leading to increase interaction with TTF1 and association with pRNA. Ref.7 Ref.10 | ||||||
| Mutagenesis | 1814 | 1 | Y → F: Impairs binding to chromatin. Ref.4 Ref.7 | ||||||
| Sequence conflict | 41 – 42 | 2 | NF → SL in CAC69992. Ref.1 | ||||||
Sequences
| ||||||||||||||||||||||||||||||
References
| « Hide 'large scale' references | |
| [1] | "The transcriptional landscape of the mammalian genome." Carninci P., Kasukawa T., Katayama S., Gough J., Frith M.C., Maeda N., Oyama R., Ravasi T., Lenhard B., Wells C., Kodzius R., Shimokawa K., Bajic V.B., Brenner S.E., Batalov S., Forrest A.R., Zavolan M., Davis M.J. Hayashizaki Y.Science 309:1559-1563(2005) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 1-703 (ISOFORM 3). Strain: NOD. |
| [2] | "NoRC -- a novel member of mammalian ISWI-containing chromatin remodeling machines." Strohner R., Nemeth A., Jansa P., Hofmann-Rohrer U., Santoro R., Laengst G., Grummt I. EMBO J. 20:4892-4900(2001) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 40-1889 (ISOFORM 1), FUNCTION, SUBCELLULAR LOCATION, INTERACTION WITH SMARCA5 AND TTF1. |
| [3] | "Prediction of the coding sequences of mouse homologues of KIAA gene: II. The complete nucleotide sequences of 400 mouse KIAA-homologous cDNAs identified by screening of terminal sequences of cDNA clones randomly sampled from size-fractionated libraries." Okazaki N., Kikuno R., Ohara R., Inamoto S., Aizawa H., Yuasa S., Nakajima D., Nagase T., Ohara O., Koga H. DNA Res. 10:35-48(2003) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 1003-1889 (ISOFORM 2). Tissue: Brain. |
| [4] | "The chromatin remodeling complex NoRC targets HDAC1 to the ribosomal gene promoter and represses RNA polymerase I transcription." Zhou Y., Santoro R., Grummt I. EMBO J. 21:4632-4640(2002) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, SUBCELLULAR LOCATION, INTERACTION WITH HDAC1 AND SIN3A, MUTAGENESIS OF TYR-1814. |
| [5] | "The chromatin remodeling complex NoRC and TTF-I cooperate in the regulation of the mammalian rRNA genes in vivo." Nemeth A., Strohner R., Grummt I., Laengst G. Nucleic Acids Res. 32:4091-4099(2004) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH TTF1. |
| [6] | "The PHD finger/bromodomain of NoRC interacts with acetylated histone H4K16 and is sufficient for rDNA silencing." Zhou Y., Grummt I. Curr. Biol. 15:1434-1438(2005) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, SUBCELLULAR LOCATION, DOMAIN BROMO AND PHD-TYPE ZINC FINGER, INTERACTION WITH DNMT1; DNM3B; HDAC1 AND SMARCA5. |
| [7] | "Intergenic transcripts regulate the epigenetic state of rRNA genes." Mayer C., Schmitz K.-M., Li J., Grummt I., Santoro R. Mol. Cell 22:351-361(2006) [PubMed] [Europe PMC] [Abstract] Cited for: RNA-BINDING, DOMAIN MBD, MUTAGENESIS OF 570-TRP-TYR-571. |
| [8] | "Large-scale phosphorylation analysis of mouse liver." Villen J., Beausoleil S.A., Gerber S.A., Gygi S.P. Proc. Natl. Acad. Sci. U.S.A. 104:1488-1493(2007) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-1042, MASS SPECTROMETRY. Tissue: Liver. |
| [9] | "The structure of NoRC-associated RNA is crucial for targeting the chromatin remodelling complex NoRC to the nucleolus." Mayer C., Neubert M., Grummt I. EMBO Rep. 9:774-780(2008) [PubMed] [Europe PMC] [Abstract] Cited for: SUBCELLULAR LOCATION, RNA-BINDING. |
| [10] | "Reversible acetylation of the chromatin remodelling complex NoRC is required for non-coding RNA-dependent silencing." Zhou Y., Schmitz K.M., Mayer C., Yuan X., Akhtar A., Grummt I. Nat. Cell Biol. 11:1010-1016(2009) [PubMed] [Europe PMC] [Abstract] Cited for: ACETYLATION AT LYS-672, RNA-BINDING, SUBCELLULAR LOCATION, MUTAGENESIS OF 570-TRP-TYR-571 AND LYS-672. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | AK155523 mRNA. Translation: BAE33307.1. AJ309544 mRNA. Translation: CAC69992.1. AK122243 mRNA. Translation: BAC65525.1. |
| IPI | IPI00130157. IPI00944144. IPI00944160. |
| UniGene | Mm.252213. |
3D structure databases | |
| ProteinModelPortal | Q91YE5. |
| SMR | Q91YE5. Positions 1659-1883. |
| ModBase | Search... |
PTM databases | |
| PhosphoSite | Q91YE5. |
Proteomic databases | |
| PaxDb | Q91YE5. |
| PRIDE | Q91YE5. |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| UCSC | uc007hlj.1. mouse. |
Organism-specific databases | |
| MGI | MGI:2151152. Baz2a. |
| Rouge | Search... |
Phylogenomic databases | |
| eggNOG | COG5076. |
| HOGENOM | HOG000169644. |
| HOVERGEN | HBG107494. |
| InParanoid | Q80U42. |
| OrthoDB | EOG44QT05. |
Gene expression databases | |
| CleanEx | MM_BAZ2A. |
| Genevestigator | Q91YE5. |
| GermOnline | ENSMUSG00000040054. Mus musculus. |
Family and domain databases | |
| Gene3D | 1.20.920.10. 1 hit. 3.30.40.10. 1 hit. 3.30.890.10. 1 hit. |
| InterPro | IPR017956. AT_hook_DNA-bd_motif. IPR001487. Bromodomain. IPR018359. Bromodomain_CS. IPR004022. DDT_dom. IPR018500. DDT_dom_subgr. IPR018501. DDT_dom_superfamily. IPR016177. DNA-bd_integrase-typ. IPR001739. Methyl_CpG_DNA-bd. IPR011011. Znf_FYVE_PHD. IPR001965. Znf_PHD. IPR019787. Znf_PHD-finger. IPR013083. Znf_RING/FYVE/PHD. [Graphical view] |
| Pfam | PF00439. Bromodomain. 1 hit. PF02791. DDT. 1 hit. PF01429. MBD. 1 hit. PF00628. PHD. 1 hit. [Graphical view] |
| PRINTS | PR00503. BROMODOMAIN. |
| SMART | SM00384. AT_hook. 4 hits. SM00297. BROMO. 1 hit. SM00571. DDT. 1 hit. SM00391. MBD. 1 hit. SM00249. PHD. 1 hit. [Graphical view] |
| SUPFAM | SSF47370. Bromodomain. 1 hit. SSF54171. DNA-binding_integrase-type. 1 hit. SSF57903. FYVE_PHD_ZnF. 1 hit. |
| PROSITE | PS00633. BROMODOMAIN_1. 1 hit. PS50014. BROMODOMAIN_2. 1 hit. PS50827. DDT. 1 hit. PS50982. MBD. 1 hit. PS01359. ZF_PHD_1. False negative. PS50016. ZF_PHD_2. 1 hit. [Graphical view] |
| ProtoNet | Search... |
Other | |
| ChiTaRS | BAZ2A. mouse. |
| SOURCE | Search... |
Entry information
| Entry name | BAZ2A_MOUSE | ||||||||
| Accession | Primary (citable) accession number: Q91YE5 Secondary accession number(s): Q3U235, Q80U42 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
Relevant documents
| MGD cross-references Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with
