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Q9Z265

- CHK2_MOUSE

UniProt

Q9Z265 - CHK2_MOUSE

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Protein
Serine/threonine-protein kinase Chk2
Gene
Chek2, Chk2, Rad53
Organism
Mus musculus (Mouse)
Status
Reviewed - Annotation score: 5 out of 5 - Experimental evidence at protein leveli

Functioni

Serine/threonine-protein kinase which is required for checkpoint-mediated cell cycle arrest, activation of DNA repair and apoptosis in response to the presence of DNA double-strand breaks. May also negatively regulate cell cycle progression during unperturbed cell cycles. Following activation, phosphorylates numerous effectors preferentially at the consensus sequence [L-X-R-X-X-S/T]. Regulates cell cycle checkpoint arrest through phosphorylation of CDC25A, CDC25B and CDC25C, inhibiting their activity. Inhibition of CDC25 phosphatase activity leads to increased inhibitory tyrosine phosphorylation of CDK-cyclin complexes and blocks cell cycle progression. May also phosphorylate NEK6 which is involved in G2/M cell cycle arrest. Regulates DNA repair through phosphorylation of BRCA2, enhancing the association of RAD51 with chromatin which promotes DNA repair by homologous recombination. Also stimulates the transcription of genes involved in DNA repair (including BRCA2) through the phosphorylation and activation of the transcription factor FOXM1. Regulates apoptosis through the phosphorylation of p53/TP53, MDM4 and PML. Phosphorylation of p53/TP53 at 'Ser-20' by CHEK2 may alleviate inhibition by MDM2, leading to accumulation of active p53/TP53. Phosphorylation of MDM4 may also reduce degradation of p53/TP53. Also controls the transcription of pro-apoptotic genes through phosphorylation of the transcription factor E2F1. Tumor suppressor, it may also have a DNA damage-independent function in mitotic spindle assembly by phosphorylating BRCA1. Its absence may be a cause of the chromosomal instability observed in some cancer cells.1 Publication

Catalytic activityi

ATP + a protein = ADP + a phosphoprotein.

Cofactori

Magnesium.

Enzyme regulationi

Activated through phosphorylation at Thr-68 by ATM in response to DNA double-strand breaks. Activation is modulated by several mediators including MDC1 and TP53BP1. Induces homodimerization with exchange of the T-loop/activation segment between protomers and transphosphorylation of the protomers. The autophosphorylated kinase dimer is fully active. Negatively regulated by PPM1D through dephosphorylation of Thr-68 By similarity.

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Binding sitei253 – 2531ATP By similarity
Active sitei351 – 3511Proton acceptor By similarity
Binding sitei372 – 3721ATP By similarity

Regions

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Nucleotide bindingi231 – 2388ATP By similarity
Nucleotide bindingi306 – 3127ATP By similarity
Nucleotide bindingi355 – 3562ATP By similarity

GO - Molecular functioni

  1. ATP binding Source: UniProtKB-KW
  2. metal ion binding Source: UniProtKB-KW
  3. protein homodimerization activity Source: UniProtKB
  4. protein serine/threonine kinase activity Source: UniProtKB
Complete GO annotation...

GO - Biological processi

  1. DNA damage induced protein phosphorylation Source: UniProtKB
  2. G2/M transition of mitotic cell cycle Source: UniProtKB
  3. apoptotic process Source: MGI
  4. cellular protein catabolic process Source: Ensembl
  5. cellular response to DNA damage stimulus Source: UniProtKB
  6. double-strand break repair Source: UniProtKB
  7. intrinsic apoptotic signaling pathway in response to DNA damage Source: UniProtKB
  8. positive regulation of transcription, DNA-templated Source: UniProtKB
  9. protein autophosphorylation Source: UniProtKB
  10. protein stabilization Source: Ensembl
  11. regulation of protein catabolic process Source: UniProtKB
  12. regulation of transcription, DNA-templated Source: UniProtKB
  13. response to gamma radiation Source: MGI
  14. signal transduction in response to DNA damage Source: MGI
  15. signal transduction involved in intra-S DNA damage checkpoint Source: UniProtKB
  16. spindle assembly involved in mitosis Source: UniProtKB
  17. transcription, DNA-templated Source: UniProtKB-KW
Complete GO annotation...

Keywords - Molecular functioni

Kinase, Serine/threonine-protein kinase, Transferase

Keywords - Biological processi

Apoptosis, Cell cycle, Cell division, DNA damage, DNA repair, Mitosis, Transcription, Transcription regulation

Keywords - Ligandi

ATP-binding, Magnesium, Metal-binding, Nucleotide-binding

Enzyme and pathway databases

BRENDAi2.7.11.1. 3474.

Names & Taxonomyi

Protein namesi
Recommended name:
Serine/threonine-protein kinase Chk2 (EC:2.7.11.1)
Alternative name(s):
CHK2 checkpoint homolog
Checkpoint kinase 2
Gene namesi
Name:Chek2
Synonyms:Chk2, Rad53
OrganismiMus musculus (Mouse)
Taxonomic identifieri10090 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaSciurognathiMuroideaMuridaeMurinaeMusMus
ProteomesiUP000000589: Chromosome 5

Organism-specific databases

MGIiMGI:1355321. Chek2.

Subcellular locationi

NucleusPML body By similarity. Nucleusnucleoplasm
Note: Recruited into PML bodies together with TP53 By similarity.

GO - Cellular componenti

  1. PML body Source: UniProtKB
  2. chromosome, telomeric region Source: Ensembl
Complete GO annotation...

Keywords - Cellular componenti

Nucleus

Pathology & Biotechi

Disruption phenotypei

No overt morphological phenotype but apoptosis and cell cycle arrest induced by ionizing radiation are abolished.1 Publication

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 546546Serine/threonine-protein kinase Chk2
PRO_0000085859Add
BLAST

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Modified residuei68 – 681Phosphothreonine; by MLTK By similarity
Modified residuei71 – 711Phosphoserine; by PLK3 By similarity
Modified residuei77 – 771Phosphothreonine; by ATM and MLTK By similarity
Modified residuei82 – 821Phosphoserine; by PLK3 By similarity
Modified residuei383 – 3831Phosphoserine; by autocatalysis By similarity
Modified residuei387 – 3871Phosphothreonine; by autocatalysis By similarity
Modified residuei391 – 3911Phosphothreonine; by autocatalysis By similarity
Modified residuei460 – 4601Phosphoserine By similarity

Post-translational modificationi

Phosphorylated. Phosphorylated at Ser-82 by PLK3 in response to DNA damage, promoting phosphorylation at Thr-77 by ATM and the G2/M transition checkpoint. Phosphorylation at Thr-77 induces homodimerization. Autophosphorylates at Thr-387 and Thr-391 in the T-loop/activation segment upon dimerization to become fully active. DNA damage-induced autophosphorylation at Ser-383 induces CUL1-mediated ubiquitination and regulates the pro-apoptotic function. Phosphorylation at Ser-460 also regulates ubiquitination. Phosphorylated by PLK4 By similarity.
Ubiquitinated. CUL1-mediated ubiquitination regulates the pro-apoptotic function. Ubiquitination may also regulate protein stability. Ubiquitinated by RNF8 via 'Lys-48'-linked ubiquitination By similarity.

Keywords - PTMi

Phosphoprotein, Ubl conjugation

Proteomic databases

MaxQBiQ9Z265.
PaxDbiQ9Z265.
PRIDEiQ9Z265.

PTM databases

PhosphoSiteiQ9Z265.

Expressioni

Tissue specificityi

Ubiquitously expressed with higher levels in the thymus, spleen and colon (at protein level).1 Publication

Gene expression databases

ArrayExpressiQ9Z265.
BgeeiQ9Z265.
CleanExiMM_CHEK2.
GenevestigatoriQ9Z265.

Interactioni

Subunit structurei

Homodimer. Homodimerization is part of the activation process but the dimer may dissociate following activation. Interacts with PML. Interacts with TP53. Interacts with RB1; phosphorylates RB1. Interacts with BRCA1. Interacts (phosphorylated at Thr-68) with MDC1; requires ATM-mediated phosphorylation of CHEK2. Interacts with TP53BP1; modulates CHEK2 phosphorylation at Thr-68 in response to ionizing radiation. Interacts with CDC25A; phosphorylates CDC25A and mediates its degradation in response to ionizing radiation. Interacts with CUL1; mediates CHEK2 ubiquitination and regulation By similarity.

Protein-protein interaction databases

BioGridi206143. 6 interactions.
IntActiQ9Z265. 4 interactions.

Structurei

3D structure databases

ProteinModelPortaliQ9Z265.
SMRiQ9Z265. Positions 94-506.

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Domaini117 – 17963FHA
Add
BLAST
Domaini224 – 490267Protein kinase
Add
BLAST

Region

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Regioni372 – 39827T-loop/activation segment By similarity
Add
BLAST

Sequence similaritiesi

Contains 1 FHA domain.

Phylogenomic databases

eggNOGiCOG0515.
GeneTreeiENSGT00710000106821.
HOGENOMiHOG000233016.
HOVERGENiHBG108055.
InParanoidiQ9Z265.
KOiK06641.
OMAiKFAIGSE.
OrthoDBiEOG7C5M7Z.
PhylomeDBiQ9Z265.
TreeFamiTF101082.

Family and domain databases

Gene3Di2.60.200.20. 1 hit.
InterProiIPR000253. FHA_dom.
IPR011009. Kinase-like_dom.
IPR000719. Prot_kinase_dom.
IPR002290. Ser/Thr_dual-sp_kinase_dom.
IPR008271. Ser/Thr_kinase_AS.
IPR008984. SMAD_FHA_domain.
[Graphical view]
PfamiPF00498. FHA. 1 hit.
PF00069. Pkinase. 1 hit.
[Graphical view]
SMARTiSM00240. FHA. 1 hit.
SM00220. S_TKc. 1 hit.
[Graphical view]
SUPFAMiSSF49879. SSF49879. 1 hit.
SSF56112. SSF56112. 1 hit.
PROSITEiPS50006. FHA_DOMAIN. 1 hit.
PS50011. PROTEIN_KINASE_DOM. 1 hit.
PS00108. PROTEIN_KINASE_ST. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Q9Z265-1 [UniParc]FASTAAdd to Basket

« Hide

MKSHHQSHSS TSSKAHDSAS CSQSQGGFSQ PQGTPSQLHE LSQYQGSSSS    50
STGTVPSSSQ SSHSSSGTLS SLETVSTQEL CSIPEDQEPE EPGPAPWARL 100
WALQDGFSNL DCVNDNYWFG RDKSCEYCFD GPLLRRTDKY RTYSKKHFRI 150
FREMGPKNCY IVYIEDHSGN GTFVNTELIG KGKRCPLSNN SEIALSLCRN 200
KVFVFFDLTV DDQSVYPKEL RDEYIMSKTL GSGACGEVKM AFERKTCQKV 250
AIKIISKRRF ALGSSREADT APSVETEIEI LKKLNHPCII KIKDVFDAED 300
YYIVLELMEG GELFDRVVGN KRLKEATCKL YFYQMLVAVQ YLHENGIIHR 350
DLKPENVLLS SQEEDCLIKI TDFGQSKILG ETSLMRTLCG TPTYLAPEVL 400
VSNGTAGYSR AVDCWSLGVI LFICLSGYPP FSEHKTQVSL KDQITSGKYN 450
FIPEVWTDVS EEALDLVKKL LVVDPKARLT TEEALNHPWL QDEYMKKKFQ 500
DLLVQEKNSV TLPVAPAQTS SQKRPLELEV EGMPSTKRLS VCGAVL 546
Length:546
Mass (Da):61,088
Last modified:May 1, 1999 - v1
Checksum:iA7949EFB5572CDAA
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
AF086905 mRNA. Translation: AAC83694.1.
BC056617 mRNA. Translation: AAH56617.1.
CCDSiCCDS19533.1.
RefSeqiNP_057890.1. NM_016681.3.
XP_006535132.1. XM_006535069.1.
XP_006535133.1. XM_006535070.1.
UniGeneiMm.279308.

Genome annotation databases

EnsembliENSMUST00000066160; ENSMUSP00000066679; ENSMUSG00000029521.
GeneIDi50883.
KEGGimmu:50883.
UCSCiuc008yrw.1. mouse.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
AF086905 mRNA. Translation: AAC83694.1 .
BC056617 mRNA. Translation: AAH56617.1 .
CCDSi CCDS19533.1.
RefSeqi NP_057890.1. NM_016681.3.
XP_006535132.1. XM_006535069.1.
XP_006535133.1. XM_006535070.1.
UniGenei Mm.279308.

3D structure databases

ProteinModelPortali Q9Z265.
SMRi Q9Z265. Positions 94-506.
ModBasei Search...

Protein-protein interaction databases

BioGridi 206143. 6 interactions.
IntActi Q9Z265. 4 interactions.

PTM databases

PhosphoSitei Q9Z265.

Proteomic databases

MaxQBi Q9Z265.
PaxDbi Q9Z265.
PRIDEi Q9Z265.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

Ensembli ENSMUST00000066160 ; ENSMUSP00000066679 ; ENSMUSG00000029521 .
GeneIDi 50883.
KEGGi mmu:50883.
UCSCi uc008yrw.1. mouse.

Organism-specific databases

CTDi 11200.
MGIi MGI:1355321. Chek2.

Phylogenomic databases

eggNOGi COG0515.
GeneTreei ENSGT00710000106821.
HOGENOMi HOG000233016.
HOVERGENi HBG108055.
InParanoidi Q9Z265.
KOi K06641.
OMAi KFAIGSE.
OrthoDBi EOG7C5M7Z.
PhylomeDBi Q9Z265.
TreeFami TF101082.

Enzyme and pathway databases

BRENDAi 2.7.11.1. 3474.

Miscellaneous databases

NextBioi 307865.
PROi Q9Z265.
SOURCEi Search...

Gene expression databases

ArrayExpressi Q9Z265.
Bgeei Q9Z265.
CleanExi MM_CHEK2.
Genevestigatori Q9Z265.

Family and domain databases

Gene3Di 2.60.200.20. 1 hit.
InterProi IPR000253. FHA_dom.
IPR011009. Kinase-like_dom.
IPR000719. Prot_kinase_dom.
IPR002290. Ser/Thr_dual-sp_kinase_dom.
IPR008271. Ser/Thr_kinase_AS.
IPR008984. SMAD_FHA_domain.
[Graphical view ]
Pfami PF00498. FHA. 1 hit.
PF00069. Pkinase. 1 hit.
[Graphical view ]
SMARTi SM00240. FHA. 1 hit.
SM00220. S_TKc. 1 hit.
[Graphical view ]
SUPFAMi SSF49879. SSF49879. 1 hit.
SSF56112. SSF56112. 1 hit.
PROSITEi PS50006. FHA_DOMAIN. 1 hit.
PS50011. PROTEIN_KINASE_DOM. 1 hit.
PS00108. PROTEIN_KINASE_ST. 1 hit.
[Graphical view ]
ProtoNeti Search...

Publicationsi

« Hide 'large scale' publications
  1. "Linkage of ATM to cell cycle regulation by the Chk2 protein kinase."
    Matsuoka S., Huang M., Elledge S.J.
    Science 282:1893-1897(1998) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [MRNA].
  2. "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)."
    The MGC Project Team
    Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
    Strain: NMRI.
    Tissue: Mammary gland.
  3. "Chk2 is a tumor suppressor that regulates apoptosis in both an ataxia telangiectasia mutated (ATM)-dependent and an ATM-independent manner."
    Hirao A., Cheung A., Duncan G., Girard P.M., Elia A.J., Wakeham A., Okada H., Sarkissian T., Wong J.A., Sakai T., De Stanchina E., Bristow R.G., Suda T., Lowe S.W., Jeggo P.A., Elledge S.J., Mak T.W.
    Mol. Cell. Biol. 22:6521-6532(2002) [PubMed] [Europe PMC] [Abstract]
    Cited for: DISRUPTION PHENOTYPE, FUNCTION IN APOPTOSIS, TISSUE SPECIFICITY.

Entry informationi

Entry nameiCHK2_MOUSE
AccessioniPrimary (citable) accession number: Q9Z265
Entry historyi
Integrated into UniProtKB/Swiss-Prot: May 30, 2000
Last sequence update: May 1, 1999
Last modified: July 9, 2014
This is version 128 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. MGD cross-references
    Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot
  2. Human and mouse protein kinases
    Human and mouse protein kinases: classification and index
  3. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

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