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Q32KY4 (CDK4_BOVIN) Reviewed, UniProtKB/Swiss-Prot

Last modified February 19, 2014. Version 76. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (1) | Third-party data text xml rdf/xml gff fasta
to top of pageNames·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order

Names and origin

Protein namesRecommended name:
Cyclin-dependent kinase 4

EC=2.7.11.22
Alternative name(s):
Cell division protein kinase 4
Gene names
Name:CDK4
OrganismBos taurus (Bovine) [Reference proteome]
Taxonomic identifier9913 [NCBI]
Taxonomic lineageEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaLaurasiatheriaCetartiodactylaRuminantiaPecoraBovidaeBovinaeBos

Protein attributes

Sequence length303 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is further processed into a mature form.
Protein existenceEvidence at transcript level

General annotation (Comments)

Function

Ser/Thr-kinase component of cyclin D-CDK4 (DC) complexes that phosphorylate and inhibit members of the retinoblastoma (RB) protein family including RB1 and regulate the cell-cycle during G1/S transition. Phosphorylation of RB1 allows dissociation of the transcription factor E2F from the RB/E2F complexes and the subsequent transcription of E2F target genes which are responsible for the progression through the G1 phase. Hypophosphorylates RB1 in early G1 phase. Cyclin D-CDK4 complexes are major integrators of various mitogenenic and antimitogenic signals. Also phosphorylates SMAD3 in a cell-cycle-dependent manner and represses its transcriptional activity. Component of the ternary complex, cyclin D/CDK4/CDKN1B, required for nuclear translocation and activity of the cyclin D-CDK4 complex By similarity.

Catalytic activity

ATP + a protein = ADP + a phosphoprotein.

Enzyme regulation

Both phosphorylation at Thr-172 and binding of a D-type cyclin are necessary for enzymatic activity. Full activation of the cyclin-D-CDK4 complex appears to require other factors such as recruitment of the substrate via a substrate recruitment motif, and/or formation of the CDKN1B ternary complex. Inhibited by INK4 family members. In resting cells, the non-tyrosine-phosphorylated form of CDKN1B prevents phosphorylation at Thr-172 and inactivation, while, in proliferating cells, tyrosine phosphorylation of CDKN1B allows phosphorylation of Thr-172 of CDK4 and subsequennt activation.

Subunit structure

Component of the D-CDK4 complex, composed of CDK4 and some D-type G1 cyclin (CCND1, CCND2 or CCND3). Interacts directly in the complex with CCND1, CCND2 or CCND3. Interacts with SEI1 and ZNF655. Forms a ternary complex, cyclin D-CDK4-CDKN1B, involved in modulating CDK4 enzymatic activity. Interacts directly with CDKN1B (phosphorylated on 'Tyr-88' and 'Tyr-89'); the interaction allows assembly of the cyclin D-CDK4 complex, Thr-172 phosphorylation, nuclear translocation and enhances the cyclin D-CDK4 complex activity. CDK4 activity is either inhibited or enhanced depending on stoichiometry of complex. The non-tyrosine-phosphorylated form of CDKN1B prevents T-loop phosphorylation of CDK4 producing inactive CDK4. Interacts (unphosphorylated form) with CDK2. Also forms ternary complexes with CDKN1A or CDKN2A. Interacts directly with CDKN1A (via its N-terminal); the interaction promotes the assembly of the cyclin D-CDK4 complex, its nuclear translocation and promotes the cyclin D-dependent enzyme activity of CDK4. Interacts with CCND1; the interaction is prevented with the binding of CCND1 to INSM1 during cell cycle progression By similarity.

Subcellular location

Cytoplasm By similarity. Nucleus By similarity. Membrane By similarity. Note: Cytoplasmic when non-complexed. Forms a cyclin D-CDK4 complex in the cytoplasm as cells progress through G1 phase. The complex accumulates on the nuclear membrane and enters the nucleus on transition from G1 to S phase. Also present in nucleoli and heterochromatin lumps. Colocalizes with RB1 after release into the nucleus By similarity.

Post-translational modification

Phosphorylation at Thr-172 is required for enzymatic activity. Phosphorylated, in vitro, at this site by CCNH-CDK7, but, in vivo, appears to be phosphorylated by a proline-directed kinase. In the cyclin D-CDK4-CDKN1B complex, this phosphorylation and consequent CDK4 enzyme activity, is dependent on the tyrosine phosphorylation state of CDKN1B. Thus, in proliferating cells, CDK4 within the complex is phosphorylated on Thr-172 in the T-loop. In resting cells, phosphorylation on Thr-172 is prevented by the non-tyrosine-phosphorylated form of CDKN1B By similarity.

Sequence similarities

Belongs to the protein kinase superfamily. CMGC Ser/Thr protein kinase family. CDC2/CDKX subfamily.

Contains 1 protein kinase domain.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Initiator methionine11Removed By similarity
Chain2 – 303302Cyclin-dependent kinase 4
PRO_0000282334

Regions

Domain6 – 295290Protein kinase
Nucleotide binding12 – 209ATP By similarity
Region50 – 567Required for binding D-type cyclins By similarity
Compositional bias42 – 487Poly-Gly

Sites

Active site1401Proton acceptor By similarity
Binding site351ATP By similarity

Amino acid modifications

Modified residue21N-acetylalanine By similarity
Modified residue1721Phosphothreonine; by CAK By similarity

Sequences

Sequence LengthMass (Da)Tools
Q32KY4 [UniParc].

Last modified December 6, 2005. Version 1.
Checksum: 3623FDD0B25EF20A

FASTA30333,647
        10         20         30         40         50         60 
MATSRYEPVA EIGVGAYGTV YKARDPHSGH FVALKSVRVP NGGGAGGGLP ISTVREVALL 

        70         80         90        100        110        120 
RRLEAFEHPN VVRLMDVCAT ARTDRETKVT LVFEHVDQDL RTYLDKAPPP GLPVETIKDL 

       130        140        150        160        170        180 
MRQFLRGLDF LHANCIVHRD LKPENILVTS GGTVKLADFG LARIYSYQMA LTPVVVTLWY 

       190        200        210        220        230        240 
RAPEVLLQST YATPVDMWSV GCIFAEMFRR KPLFCGNSEA DQLGKIFDLI GLPPEDDWPR 

       250        260        270        280        290        300 
DVSLPRGAFS PRGPRPVQSV VPELEESGAQ LLLEMLTFNP HKRISAFRAL QHSYLHKAEG 


DAE 

« Hide

References

[1]NIH - Mammalian Gene Collection (MGC) project
Submitted (NOV-2005) to the EMBL/GenBank/DDBJ databases
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
Strain: Crossbred X Angus.
Tissue: Liver.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
BC109858 mRNA. Translation: AAI09859.1.
RefSeqNP_001032683.1. NM_001037594.2.
XP_005206610.1. XM_005206553.1.
UniGeneBt.4661.

3D structure databases

ProteinModelPortalQ32KY4.
SMRQ32KY4. Positions 2-299.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

BioGrid167251. 1 interaction.
STRING9913.ENSBTAP00000009420.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblENSBTAT00000009420; ENSBTAP00000009420; ENSBTAG00000007160.
GeneID510618.
KEGGbta:510618.

Organism-specific databases

CTD1019.

Phylogenomic databases

eggNOGCOG0515.
GeneTreeENSGT00720000108415.
HOGENOMHOG000233024.
HOVERGENHBG014652.
InParanoidQ32KY4.
KOK02089.
OMAYLQKAEG.
OrthoDBEOG73JKVV.
TreeFamTF101022.

Family and domain databases

InterProIPR011009. Kinase-like_dom.
IPR000719. Prot_kinase_dom.
IPR017441. Protein_kinase_ATP_BS.
IPR002290. Ser/Thr_dual-sp_kinase_dom.
IPR008271. Ser/Thr_kinase_AS.
[Graphical view]
PfamPF00069. Pkinase. 1 hit.
[Graphical view]
SMARTSM00220. S_TKc. 1 hit.
[Graphical view]
SUPFAMSSF56112. SSF56112. 1 hit.
PROSITEPS00107. PROTEIN_KINASE_ATP. 1 hit.
PS50011. PROTEIN_KINASE_DOM. 1 hit.
PS00108. PROTEIN_KINASE_ST. 1 hit.
[Graphical view]
ProtoNetSearch...

Other

NextBio20869536.

Entry information

Entry nameCDK4_BOVIN
AccessionPrimary (citable) accession number: Q32KY4
Entry history
Integrated into UniProtKB/Swiss-Prot: April 3, 2007
Last sequence update: December 6, 2005
Last modified: February 19, 2014
This is version 76 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families