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Protein

Structural maintenance of chromosomes protein 1A

Gene

Smc1a

Organism
Rattus norvegicus (Rat)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

Involved in chromosome cohesion during cell cycle and in DNA repair. Central component of cohesin complex. The cohesin complex is required for the cohesion of sister chromatids after DNA replication. The cohesin complex apparently forms a large proteinaceous ring within which sister chromatids can be trapped. At anaphase, the complex is cleaved and dissociates from chromatin, allowing sister chromatids to segregate. The cohesin complex may also play a role in spindle pole assembly during mitosis. Involved in DNA repair via its interaction with BRCA1 and its related phosphorylation by ATM, or via its phosphorylation by ATR. Works as a downstream effector both in the ATM/NBS1 branch and in the ATR/MSH2 branch of S-phase checkpoint.

Regions

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Nucleotide bindingi32 – 398ATPSequence analysis

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Biological processi

Cell cycle, Cell division, DNA damage, DNA repair, Meiosis, Mitosis

Keywords - Ligandi

ATP-binding, Nucleotide-binding

Names & Taxonomyi

Protein namesi
Recommended name:
Structural maintenance of chromosomes protein 1A
Short name:
SMC protein 1A
Short name:
SMC-1A
Gene namesi
Name:Smc1a
Synonyms:Smc1, Smc1l1
OrganismiRattus norvegicus (Rat)
Taxonomic identifieri10116 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaSciurognathiMuroideaMuridaeMurinaeRattus
Proteomesi
  • UP000002494 Componenti: Unplaced

Organism-specific databases

RGDi61991. Smc1a.

Subcellular locationi

  • Nucleus By similarity
  • Chromosome By similarity

  • Note: Associates with chromatin. Before prophase it is scattered along chromosome arms. During prophase, most of cohesin complexes dissociate from chromatin probably because of phosphorylation by PLK, except at centromeres, where cohesin complexes remain. At anaphase, the RAD21 subunit of the cohesin complex is cleaved, leading to the dissociation of the complex from chromosomes, allowing chromosome separation. In germ cells, cohesin complex dissociates from chromatin at prophase I, and may be replaced by a meiosis-specific cohesin complex. The phosphorylated form on Ser-957 and Ser-966 associates with chromatin during G1/S/G2 phases but not during M phase, suggesting that phosphorylation does not regulate cohesin function (By similarity).By similarity

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Chromosome, Nucleus

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 12331233Structural maintenance of chromosomes protein 1APRO_0000118991Add
BLAST

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Modified residuei358 – 3581PhosphoserineBy similarity
Modified residuei360 – 3601PhosphoserineBy similarity
Modified residuei648 – 6481N6-acetyllysineBy similarity
Modified residuei713 – 7131N6-acetyllysineBy similarity
Modified residuei957 – 9571PhosphoserineCombined sources
Modified residuei962 – 9621PhosphoserineBy similarity
Modified residuei966 – 9661PhosphoserineBy similarity
Modified residuei970 – 9701PhosphoserineBy similarity
Modified residuei1037 – 10371N6-acetyllysineBy similarity

Post-translational modificationi

Phosphorylated upon ionizing radiation or DNA methylation. Phosphorylation of Ser-957 and Ser-966 activates it and is required for S-phase checkpoint activation (By similarity).By similarity

Keywords - PTMi

Acetylation, Phosphoprotein

Proteomic databases

PRIDEiQ9Z1M9.

PTM databases

iPTMnetiQ9Z1M9.
PhosphoSiteiQ9Z1M9.

Interactioni

Subunit structurei

Interacts with POLE. Forms a heterodimer with SMC3 in cohesin complexes. Cohesin complexes are composed of the SMC1 (SMC1A or meiosis-specific SMC1B) and SMC3 heterodimer attached via their hinge domain, RAD21 which link them, and one STAG protein (STAG1, STAG2 or meiosis-specific STAG3), which interacts with RAD21. In germ cell cohesin complexes, SMC1A is mutually exclusive with SMC1B. Interacts with BRCA1. Found in a complex with CDCA5, SMC3 and RAD21, PDS5A/SCC-112 and PDS5B/APRIN. Interacts with NDC80 (By similarity). Interacts with RPGR (By similarity). Interacts with SYCP2. Interacts with BRAT1 (By similarity).By similarity1 Publication

Structurei

3D structure databases

ProteinModelPortaliQ9Z1M9.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Regioni504 – 659156Flexible hingeAdd
BLAST

Coiled coil

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Coiled coili104 – 12421Sequence analysisAdd
BLAST
Coiled coili163 – 503341Sequence analysisAdd
BLAST
Coiled coili660 – 935276Sequence analysisAdd
BLAST
Coiled coili991 – 106878Sequence analysisAdd
BLAST

Compositional bias

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Compositional biasi1128 – 116336Ala/Asp-rich (DA-box)Add
BLAST

Domaini

The flexible hinge domain, which separates the large intramolecular coiled coil regions, allows the heterotypic interaction with the corresponding domain of SMC3, forming a V-shaped heterodimer. The two heads of the heterodimer are then connected by different ends of the cleavable RAD21 protein, forming a ring structure (By similarity).By similarity

Sequence similaritiesi

Belongs to the SMC family. SMC1 subfamily.Curated

Keywords - Domaini

Coiled coil

Phylogenomic databases

HOGENOMiHOG000195481.
HOVERGENiHBG039593.
InParanoidiQ9Z1M9.
KOiK06636.
PhylomeDBiQ9Z1M9.

Family and domain databases

Gene3Di3.40.50.300. 7 hits.
InterProiIPR027417. P-loop_NTPase.
IPR003395. RecF/RecN/SMC_N.
IPR024704. SMC.
IPR029683. SMC1A_metazoan.
IPR010935. SMC_hinge.
[Graphical view]
PANTHERiPTHR18937:SF170. PTHR18937:SF170. 3 hits.
PfamiPF06470. SMC_hinge. 1 hit.
PF02463. SMC_N. 1 hit.
[Graphical view]
PIRSFiPIRSF005719. SMC. 1 hit.
SMARTiSM00968. SMC_hinge. 1 hit.
[Graphical view]
SUPFAMiSSF52540. SSF52540. 2 hits.
SSF75553. SSF75553. 1 hit.

Sequencei

Sequence statusi: Complete.

Q9Z1M9-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MGFLKLIEIE NFKSYKGRQI IGPFQRFTAI IGPNGSGKSN LMDAISFVLG
60 70 80 90 100
EKTSNLRVKT LRDLIHGAPV GKPAANRAFV SMVYSEEGAE DRTFARVIVG
110 120 130 140 150
GSSEYKINNK VVQLHEYSEE LEKLGILIKA RNFLVFQGAV ESIAMKNPKE
160 170 180 190 200
RTALFEEISR SGELAQEYDK RKKEMVKAEE DTQFNYHRKK NIAAERKEAK
210 220 230 240 250
QEKEEADRYQ ALKDEVVRAQ VQLQLFKLYH NEVEIEKLNK ELASKNKEIE
260 270 280 290 300
KDKKRMDKVE DELKEKKKEL GKMMREQQQI EKEIKEKDSE LNQKRPQYIK
310 320 330 340 350
AKENTSHKIK KLEAAKKSLQ NRQKHYKKRK GDMDELEKEM LSVEKARQEF
360 370 380 390 400
EERMEEESQS QGRDLTLEEN QVKKYHRLKE EASKRAATLA QELEKFNRDQ
410 420 430 440 450
KADQDRLDLE ERKKVETEAK IKQKLREIEE NQKRIEKLEE YITTSKQSLE
460 470 480 490 500
EQKKLEGELT EEVEMAKRRI DEINKELNQV MEQLGDARID RQESSRQQRK
510 520 530 540 550
AEIMESIKRL YPGSVYGRLI DLCQPTQKKY QIAVTKVLGK NMDAIIVDSE
560 570 580 590 600
KTGRDCIQYI KEQRGEPETF LPLDYLEVKP TDEKLRELKG AKLVIDVIRY
610 620 630 640 650
EPPHIKKALQ YACGNALVCD NVEDARRIAF GGHQRHKTVA LDGTLFQKSG
660 670 680 690 700
VISGGASDLK AKARRWDEKA VDKLKEKKER LTEELKEQMK AKRKEAELRQ
710 720 730 740 750
VQSQAHGLQM RLKYSQSDLE QTKTRHLALN LQEKSKLESE LANFGPRIND
760 770 780 790 800
IKRIIQSRER EMKDLKEKMN QVEDEVFEEF CREIGVRNIR EFEEEKVKRQ
810 820 830 840 850
NEIAKKRLEF ENQKTRLGIQ LDFEKNQLKE DQDKVHMWEQ TVKKDENEIE
860 870 880 890 900
KLKKEEQRHM KIIDETMAQL QDLKNQHLAK KSEVNDKNHE MEEIRKKLGG
910 920 930 940 950
ANKEMTHLQK EVTAIETKLE QKRSDRHNLL QACKMQDIKL PLSKGTMDDI
960 970 980 990 1000
SQEEGGSQGE ESVSGSQRTS SIYAREALIE IDYGDLCEDL KDAQAEEEIK
1010 1020 1030 1040 1050
QEMNTLQQKL NEQQSVLQRI AAPNMKAMEK LESVRDKFQE TSDEFEAARK
1060 1070 1080 1090 1100
RAKKAKQAFE QIKKERFDRF NACFESVATN IDEIYKALSR NSSAQAFLGP
1110 1120 1130 1140 1150
ENPEEPYLDG INYNCVAPGK RFRPMDNLSG GEKTVAALAL LFAIHSYKPA
1160 1170 1180 1190 1200
PFFVLDEIDA ALDNTNIGKV ANYIKEQSTC NFQAIVISLK EEFYTKAESL
1210 1220 1230
IGVYPEQGDC VISKVLTFDL TKYPDANPNP NEQ
Length:1,233
Mass (Da):143,205
Last modified:May 1, 1999 - v1
Checksum:iA20C18C1E07E8F30
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AJ005113 mRNA. Translation: CAA06377.1.
RefSeqiNP_113871.1. NM_031683.1.
UniGeneiRn.11763.

Genome annotation databases

GeneIDi63996.
KEGGirno:63996.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AJ005113 mRNA. Translation: CAA06377.1.
RefSeqiNP_113871.1. NM_031683.1.
UniGeneiRn.11763.

3D structure databases

ProteinModelPortaliQ9Z1M9.
ModBaseiSearch...
MobiDBiSearch...

PTM databases

iPTMnetiQ9Z1M9.
PhosphoSiteiQ9Z1M9.

Proteomic databases

PRIDEiQ9Z1M9.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

GeneIDi63996.
KEGGirno:63996.

Organism-specific databases

CTDi8243.
RGDi61991. Smc1a.

Phylogenomic databases

HOGENOMiHOG000195481.
HOVERGENiHBG039593.
InParanoidiQ9Z1M9.
KOiK06636.
PhylomeDBiQ9Z1M9.

Miscellaneous databases

PROiQ9Z1M9.

Family and domain databases

Gene3Di3.40.50.300. 7 hits.
InterProiIPR027417. P-loop_NTPase.
IPR003395. RecF/RecN/SMC_N.
IPR024704. SMC.
IPR029683. SMC1A_metazoan.
IPR010935. SMC_hinge.
[Graphical view]
PANTHERiPTHR18937:SF170. PTHR18937:SF170. 3 hits.
PfamiPF06470. SMC_hinge. 1 hit.
PF02463. SMC_N. 1 hit.
[Graphical view]
PIRSFiPIRSF005719. SMC. 1 hit.
SMARTiSM00968. SMC_hinge. 1 hit.
[Graphical view]
SUPFAMiSSF52540. SSF52540. 2 hits.
SSF75553. SSF75553. 1 hit.
ProtoNetiSearch...

Entry informationi

Entry nameiSMC1A_RAT
AccessioniPrimary (citable) accession number: Q9Z1M9
Entry historyi
Integrated into UniProtKB/Swiss-Prot: March 25, 2003
Last sequence update: May 1, 1999
Last modified: July 6, 2016
This is version 118 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.