UniProtKB - B2RZ55 (SIR7_RAT)
Protein
NAD-dependent protein deacetylase sirtuin-7
Gene
Sirt7
Organism
Rattus norvegicus (Rat)
Status
Functioni
NAD-dependent protein-lysine deacylase that can act both as a deacetylase or deacylase (desuccinylase, depropionylase and deglutarylase), depending on the context. Specifically mediates deacetylation of histone H3 at 'Lys-18' (H3K18Ac). In contrast to other histone deacetylases, displays strong preference for a specific histone mark, H3K18Ac, directly linked to control of gene expression. H3K18Ac is mainly present around the transcription start site of genes and has been linked to activation of nuclear hormone receptors; SIRT7 thereby acts as a transcription repressor. Moreover, H3K18 hypoacetylation has been reported as a marker of malignancy in various cancers and seems to maintain the transformed phenotype of cancer cells. Also able to mediate deacetylation of histone H3 at 'Lys-36' (H3K36Ac) in the context of nucleosomes. Also mediates deacetylation of non-histone proteins, such as ATM, CDK9, DDX21, DDB1, FBL, FKBP5/FKBP51, GABPB1, RAN, RRP9/U3-55K and POLR1E/PAF53. Enriched in nucleolus where it stimulates transcription activity of the RNA polymerase I complex. Acts by mediating the deacetylation of the RNA polymerase I subunit POLR1E/PAF53, thereby promoting the association of RNA polymerase I with the rDNA promoter region and coding region. In response to metabolic stress, SIRT7 is released from nucleoli leading to hyperacetylation of POLR1E/PAF53 and decreased RNA polymerase I transcription. Required to restore the transcription of ribosomal RNA (rRNA) at the exit from mitosis. Promotes pre-ribosomal RNA (pre-rRNA) cleavage at the 5'-terminal processing site by mediating deacetylation of RRP9/U3-55K, a core subunit of the U3 snoRNP complex. Mediates 'Lys-37' deacetylation of Ran, thereby regulating the nuclear export of NF-kappa-B subunit RELA/p65. Acts as a regulator of DNA damage repair by mediating deacetylation of ATM during the late stages of DNA damage response, promoting ATM dephosphorylation and deactivation. Suppresses the activity of the DCX (DDB1-CUL4-X-box) E3 ubiquitin-protein ligase complexes by mediating deacetylation of DDB1, which prevents the interaction between DDB1 and CUL4 (CUL4A or CUL4B). Activates RNA polymerase II transcription by mediating deacetylation of CDK9, thereby promoting 'Ser-2' phosphorylation of the C-terminal domain (CTD) of RNA polymerase II. Deacetylates FBL, promoting histone-glutamine methyltransferase activity of FBL (By similarity). Acts as a regulator of mitochondrial function by catalyzing deacetylation of GABPB1 (By similarity). Regulates Akt/AKT1 activity by mediating deacetylation of FKBP5/FKBP51. Required to prevent R-loop-associated DNA damage and transcription-associated genomic instability by mediating deacetylation and subsequent activation of DDX21, thereby overcoming R-loop-mediated stalling of RNA polymerases. In addition to protein deacetylase activity, also acts as protein-lysine deacylase (By similarity). Acts as a protein depropionylase by mediating depropionylation of Osterix (SP7), thereby regulating bone formation by osteoblasts (By similarity). Acts as a histone deglutarylase by mediating deglutarylation of histone H4 on 'Lys-91' (H4K91glu); a mark that destabilizes nucleosomes by promoting dissociation of the H2A-H2B dimers from nucleosomes. Acts as a histone desuccinylase: in response to DNA damage, recruited to DNA double-strand breaks (DSBs) and catalyzes desuccinylation of histone H3 on 'Lys-122' (H3K122succ), thereby promoting chromatin condensation and DSB repair (By similarity). Also promotes DSB repair by promoting H3K18Ac deacetylation, regulating non-homologous end joining (NHEJ). Along with its role in DNA repair, required for chromosome synapsis during prophase I of female meiosis by catalyzing H3K18Ac deacetylation (By similarity). Involved in transcriptional repression of LINE-1 retrotransposon via H3K18Ac deacetylation, and promotes their association with the nuclear lamina. Required to stabilize ribosomal DNA (rDNA) heterochromatin and prevent cellular senescence induced by rDNA instability (By similarity). Acts as a negative regulator of SIRT1 by preventing autodeacetylation of SIRT1, restricting SIRT1 deacetylase activity (By similarity).By similarity
Catalytic activityi
- H2O + N6-acetyl-L-lysyl-[protein] + NAD+ = 2''-O-acetyl-ADP-D-ribose + L-lysyl-[protein] + nicotinamidePROSITE-ProRule annotationBy similarityEC:2.3.1.286PROSITE-ProRule annotationBy similarityThis reaction proceeds in the forwardBy similarity direction.
- H2O + N6-glutaryl-L-lysyl-[protein] + NAD+ = 2''-O-glutaryl-ADP-D-ribose + L-lysyl-[protein] + nicotinamideBy similarityThis reaction proceeds in the forwardBy similarity direction.
- H2O + N6-succinyl-L-lysyl-[protein] + NAD+ = 2''-O-succinyl-ADP-D-ribose + L-lysyl-[protein] + nicotinamideBy similarityThis reaction proceeds in the forwardBy similarity direction.
- H2O + N6-propanoyl-L-lysyl-[protein] + NAD+ = 3''-O-propanoyl-ADP-D-ribose + L-lysyl-[protein] + nicotinamideBy similarityThis reaction proceeds in the forwardBy similarity direction.
Cofactori
Zn2+By similarityNote: Binds 1 zinc ion per subunit.By similarity
Activity regulationi
NAD-dependent protein-lysine deacetylase and deacylase activities are activated by nucleic acids. Histone deacetylase activity is activated by DNA. Protein-lysine deacylase activity is activated by RNA. H3K18Ac histone deacetylase activity is inhibited by methylation at Arg-390. H3K18Ac histone deacetylase activity is inhibited by deubiquitination by USP7.By similarity
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Active sitei | 188 | Proton acceptorPROSITE-ProRule annotation | 1 | |
Metal bindingi | 196 | ZincPROSITE-ProRule annotation | 1 | |
Metal bindingi | 199 | ZincPROSITE-ProRule annotation | 1 | |
Metal bindingi | 226 | ZincPROSITE-ProRule annotation | 1 | |
Metal bindingi | 229 | ZincPROSITE-ProRule annotation | 1 | |
Binding sitei | 316 | NAD; via amide nitrogenBy similarity | 1 |
Regions
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Nucleotide bindingi | 108 – 127 | NADBy similarityAdd BLAST | 20 | |
Nucleotide bindingi | 168 – 171 | NADBy similarity | 4 | |
Nucleotide bindingi | 269 – 271 | NADBy similarity | 3 | |
Nucleotide bindingi | 298 – 300 | NADBy similarity | 3 |
GO - Molecular functioni
- chromatin binding Source: UniProtKB
- deacetylase activity Source: GO_Central
- histone deacetylase activity Source: GO_Central
- metal ion binding Source: UniProtKB-KW
- NAD+ binding Source: InterPro
- NAD-dependent histone deacetylase activity (H3-K18 specific) Source: UniProtKB
- NAD-dependent protein deacetylase activity Source: UniProtKB
- protein-glutaryllysine deglutarylase activity Source: UniProtKB
- protein-propionyllysine depropionylase activity Source: UniProtKB
- protein-succinyllysine desuccinylase activity Source: UniProtKB
- transcription corepressor activity Source: GO_Central
GO - Biological processi
- cellular response to DNA damage stimulus Source: UniProtKB
- DNA repair Source: UniProtKB-KW
- histone glutamine methylation Source: UniProtKB
- histone H3 deacetylation Source: UniProtKB
- histone modification Source: UniProtKB
- homologous chromosome pairing at meiosis Source: UniProtKB
- negative regulation of protein ubiquitination Source: UniProtKB
- negative regulation of transcription by RNA polymerase II Source: UniProtKB
- negative regulation of transposition Source: UniProtKB
- osteoblast differentiation Source: UniProtKB
- peptidyl-lysine desuccinylation Source: UniProtKB
- positive regulation of rRNA processing Source: UniProtKB
- positive regulation of transcription by RNA polymerase II Source: UniProtKB
- positive regulation of transcription involved in exit from mitosis Source: RGD
- protein deacetylation Source: UniProtKB
- protein deglutarylation Source: UniProtKB
- protein depropionylation Source: UniProtKB
- regulation of DNA repair Source: UniProtKB
- regulation of double-strand break repair via nonhomologous end joining Source: UniProtKB
- regulation of gluconeogenesis Source: UniProtKB
- regulation of mitochondrion organization Source: UniProtKB
- regulation of protein export from nucleus Source: UniProtKB
- regulation of transcription of nucleolar large rRNA by RNA polymerase I Source: UniProtKB
- R-loop disassembly Source: UniProtKB
- rRNA transcription Source: RGD
Keywordsi
Molecular function | Chromatin regulator, Repressor, Transferase |
Biological process | DNA damage, DNA repair, Transcription, Transcription regulation |
Ligand | Metal-binding, NAD, Zinc |
Names & Taxonomyi
Protein namesi | |
Gene namesi | Name:Sirt7Imported |
Organismi | Rattus norvegicus (Rat) |
Taxonomic identifieri | 10116 [NCBI] |
Taxonomic lineagei | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Myomorpha › Muroidea › Muridae › Murinae › Rattus |
Proteomesi |
|
Organism-specific databases
RGDi | 1305876, Sirt7 |
Subcellular locationi
Nucleus
- nucleolus By similarity
- nucleoplasm By similarity
Other locations
- Chromosome By similarity
- Cytoplasm By similarity
Note: Mainly localizes in the nucleolus and nucleoplasm. Associated with rDNA promoter and transcribed region. Associated with nucleolar organizer regions during mitosis. In response to stress, released from nucleolus to nucleoplasm. Associated with chromatin. In response to DNA damage, recruited to DNA double-strand breaks (DSBs) sites. Located close to the nuclear membrane when in the cytoplasm.By similarity
Nucleus
- nucleolus Source: RGD
- nucleolus organizer region Source: RGD
- nucleoplasm Source: RGD
- nucleus Source: RGD
Other locations
- chromatin Source: UniProtKB
- cytoplasm Source: UniProtKB-SubCell
- site of double-strand break Source: UniProtKB
Keywords - Cellular componenti
Chromosome, Cytoplasm, NucleusPTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000419985 | 1 – 402 | NAD-dependent protein deacetylase sirtuin-7Add BLAST | 402 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Modified residuei | 390 | Asymmetric dimethylarginine; alternateBy similarity | 1 | |
Modified residuei | 390 | Omega-N-methylarginine; alternateBy similarity | 1 |
Post-translational modificationi
Phosphorylated during mitosis.By similarity
Methylation at Arg-390 by PRMT6 inhibits the H3K18Ac histone deacetylase activity, promoting mitochondria biogenesis and maintaining mitochondria respiration.By similarity
Ubiquitinated via 'Lys-63'-linked ubiquitin chains. Deubiquitinated by USP7, inhibiting the H3K18Ac histone deacetylase activity and regulating gluconeogenesis.By similarity
Keywords - PTMi
Methylation, Phosphoprotein, Ubl conjugationProteomic databases
PaxDbi | B2RZ55 |
PeptideAtlasi | B2RZ55 |
PRIDEi | B2RZ55 |
PTM databases
PhosphoSitePlusi | B2RZ55 |
Expressioni
Gene expression databases
Bgeei | ENSRNOG00000036683, Expressed in thymus and 22 other tissues |
Genevisiblei | B2RZ55, RN |
Interactioni
Subunit structurei
Interacts with UBTF and the RNA polymerase I complex.
Interacts with components of the B-WICH complex, such as MYBBP1A, SMARCA5/SNF2H and BAZ1B/WSTF.
Interacts with ELK4, leading to stabilization at target promoters for H3K18Ac deacetylation.
Interacts with histone H2A and/or histone H2B (By similarity).
Interacts with DNMT1.
Interacts with SIRT1 (By similarity).
By similarityProtein-protein interaction databases
STRINGi | 10116.ENSRNOP00000051834 |
Family & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Domaini | 91 – 332 | Deacetylase sirtuin-typePROSITE-ProRule annotationAdd BLAST | 242 |
Compositional bias
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Compositional biasi | 9 – 75 | Arg-richAdd BLAST | 67 |
Sequence similaritiesi
Phylogenomic databases
eggNOGi | KOG1905, Eukaryota |
GeneTreei | ENSGT00940000159703 |
HOGENOMi | CLU_023643_6_2_1 |
InParanoidi | B2RZ55 |
OMAi | RGCAKRA |
OrthoDBi | 1459156at2759 |
PhylomeDBi | B2RZ55 |
Family and domain databases
InterProi | View protein in InterPro IPR029035, DHS-like_NAD/FAD-binding_dom IPR003000, Sirtuin IPR026590, Ssirtuin_cat_dom |
Pfami | View protein in Pfam PF02146, SIR2, 1 hit |
SUPFAMi | SSF52467, SSF52467, 1 hit |
PROSITEi | View protein in PROSITE PS50305, SIRTUIN, 1 hit |
i Sequence
Sequence statusi: Complete.
B2RZ55-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MAAGGGLSRS ERKAAERVRR LREEQQRERL RQVSRILRKA AAERSAEEGR
60 70 80 90 100
LLAESEDLVT ELQGRSRRRE GLKRRQEEVC DDPEELRRKV RELAGAVRSA
110 120 130 140 150
RHLVVYTGAG ISTAASIPDY RGPNGVWTLL QKGRPVSAAD LSEAEPTLTH
160 170 180 190 200
MSITQLHKHK LVQHVVSQNC DGLHLRSGLP RTAISELHGN MYIEVCTSCI
210 220 230 240 250
PNREYVRVFD VTERTALHRH LTGRTCHKCG TQLRDTIVHF GERGTLGQPL
260 270 280 290 300
NWEAATEAAS KADTILCLGS SLKVLKKYPR LWCMTKPPSR RPKLYIVNLQ
310 320 330 340 350
WTPKDDWAAL KLHGKCDDVM RLLMDELGLE IPVYNRWQDP IFSLATPLRA
360 370 380 390 400
GEEGSHSRKS LCRSREEPPP GDQSAPLASA TPILGGWFGR GCAKRAKRKK
AA
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | CH473948 Genomic DNA Translation: EDM06872.1 BC167031 mRNA Translation: AAI67031.1 |
RefSeqi | NP_001100543.1, NM_001107073.1 |
Genome annotation databases
Ensembli | ENSRNOT00000054951; ENSRNOP00000051834; ENSRNOG00000036683 |
GeneIDi | 303745 |
KEGGi | rno:303745 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | CH473948 Genomic DNA Translation: EDM06872.1 BC167031 mRNA Translation: AAI67031.1 |
RefSeqi | NP_001100543.1, NM_001107073.1 |
3D structure databases
SMRi | B2RZ55 |
ModBasei | Search... |
Protein-protein interaction databases
STRINGi | 10116.ENSRNOP00000051834 |
PTM databases
PhosphoSitePlusi | B2RZ55 |
Proteomic databases
PaxDbi | B2RZ55 |
PeptideAtlasi | B2RZ55 |
PRIDEi | B2RZ55 |
Genome annotation databases
Ensembli | ENSRNOT00000054951; ENSRNOP00000051834; ENSRNOG00000036683 |
GeneIDi | 303745 |
KEGGi | rno:303745 |
Organism-specific databases
CTDi | 51547 |
RGDi | 1305876, Sirt7 |
Phylogenomic databases
eggNOGi | KOG1905, Eukaryota |
GeneTreei | ENSGT00940000159703 |
HOGENOMi | CLU_023643_6_2_1 |
InParanoidi | B2RZ55 |
OMAi | RGCAKRA |
OrthoDBi | 1459156at2759 |
PhylomeDBi | B2RZ55 |
Miscellaneous databases
PROi | PR:B2RZ55 |
Gene expression databases
Bgeei | ENSRNOG00000036683, Expressed in thymus and 22 other tissues |
Genevisiblei | B2RZ55, RN |
Family and domain databases
InterProi | View protein in InterPro IPR029035, DHS-like_NAD/FAD-binding_dom IPR003000, Sirtuin IPR026590, Ssirtuin_cat_dom |
Pfami | View protein in Pfam PF02146, SIR2, 1 hit |
SUPFAMi | SSF52467, SSF52467, 1 hit |
PROSITEi | View protein in PROSITE PS50305, SIRTUIN, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | SIR7_RAT | |
Accessioni | B2RZ55Primary (citable) accession number: B2RZ55 Secondary accession number(s): F1LQY4 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | October 31, 2012 |
Last sequence update: | July 1, 2008 | |
Last modified: | December 2, 2020 | |
This is version 80 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Chordata Protein Annotation Program |
Miscellaneousi
Keywords - Technical termi
Reference proteomeDocuments
- SIMILARITY comments
Index of protein domains and families