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(-) Description

Title :  CRYSTAL STRUCTURE OF THE SKP1-SKP2-CKS1 COMPLEX
 
Authors :  B. Hao, N. Zhang, B. A. Schulman, G. Wu, M. Pagano, N. P. Pavletich
Date :  24 Aug 05  (Deposition) - 18 Oct 05  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  3.00
Chains :  Asym. Unit :  A,B,C
Biol. Unit 1:  A,B,C  (1x)
Biol. Unit 2:  A,B,C  (2x)
Biol. Unit 3:  A (2x),B (2x),C (2x)
Keywords :  Protein-Protein Complex, Lrr, Scf, Cell Cycle/Ligase/Protein Turnover Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  B. Hao, N. Zheng, B. A. Schulman, G. Wu, J. J. Miller, M. Pagano, N. P. Pavletich
Structural Basis Of The Cks1-Dependent Recognition Of P27(Kip1) By The Scf(Skp2) Ubiquitin Ligase.
Mol. Cell V. 20 9 2005
PubMed-ID: 16209941  |  Reference-DOI: 10.1016/J.MOLCEL.2005.09.003
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - S-PHASE KINASE-ASSOCIATED PROTEIN 1A
    ChainsA
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidPGEX4T1
    Expression System StrainBL21 (DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    GeneSKP1A, EMC19, OCP2, SKP1, TCEB1L
    MutationYES
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymCYCLIN A/CDK2-ASSOCIATED PROTEIN P19, P19A, P19SKP1, RNA POLYMERASE II ELONGATION FACTOR-LIKE PROTEIN, ORGAN OF CORTI PROTEIN 2, OCP-II PROTEIN, OCP-2, TRANSCRIPTION ELONGATION FACTOR B, SIII
 
Molecule 2 - S-PHASE KINASE-ASSOCIATED PROTEIN 2
    ChainsB
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidPGEX4T1
    Expression System StrainBL21 (DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    GeneSKP2, FBXL1
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymF-BOX PROTEIN SKP2, CYCLIN A/CDK2-ASSOCIATED PROTEIN P45, P45SKP2, F-BOX/LRR-REPEAT PROTEIN 1
 
Molecule 3 - CYCLIN-DEPENDENT KINASES REGULATORY SUBUNIT 1
    ChainsC
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidPGEX4T3
    Expression System StrainBL21 (DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    GeneCKS1, CKS1B
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymCKS-1

 Structural Features

(-) Chains, Units

  123
Asymmetric Unit ABC
Biological Unit 1 (1x)ABC
Biological Unit 2 (2x)ABC
Biological Unit 3 (2x)A (2x)B (2x)C (2x)

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 5)

Asymmetric Unit (2, 5)
No.NameCountTypeFull Name
1BEN2Ligand/IonBENZAMIDINE
2PO43Ligand/IonPHOSPHATE ION
Biological Unit 1 (2, 5)
No.NameCountTypeFull Name
1BEN2Ligand/IonBENZAMIDINE
2PO43Ligand/IonPHOSPHATE ION
Biological Unit 2 (2, 10)
No.NameCountTypeFull Name
1BEN4Ligand/IonBENZAMIDINE
2PO46Ligand/IonPHOSPHATE ION
Biological Unit 3 (0, 0)
No.NameCountTypeFull Name
1BEN-1Ligand/IonBENZAMIDINE
2PO4-1Ligand/IonPHOSPHATE ION

(-) Sites  (5, 5)

Asymmetric Unit (5, 5)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREHOH B:67 , HIS B:2199 , SER B:2203 , THR B:2225 , PRO C:3062BINDING SITE FOR RESIDUE PO4 B 3
2AC2SOFTWAREHOH C:72 , LYS C:3011 , ARG C:3020 , GLN C:3050 , SER C:3051 , TRP C:3054BINDING SITE FOR RESIDUE PO4 C 4
3AC3SOFTWAREASN B:2190 , GLU B:2214 , GLY B:2215 , LEU C:3037 , MET C:3038 , SER C:3039 , HIS C:3056BINDING SITE FOR RESIDUE PO4 B 5
4AC4SOFTWAREHOH B:22 , HOH B:38 , ALA B:2227 , SER B:2254 , HIS C:3060 , GLU C:3063BINDING SITE FOR RESIDUE BEN B 1
5AC5SOFTWAREPHE B:2169 , VAL B:2192 , TYR C:3057 , MET C:3058BINDING SITE FOR RESIDUE BEN C 2

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 2ASS)

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2ASS)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (1, 1)

Asymmetric Unit (1, 1)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_051999F14LSKP1_HUMANPolymorphism11538034AF1014L

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)
Biological Unit 1 (1, 1)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_051999F14LSKP1_HUMANPolymorphism11538034AF1014L

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)
Biological Unit 2 (1, 2)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_051999F14LSKP1_HUMANPolymorphism11538034AF1014L

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)
Biological Unit 3 (1, 2)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_051999F14LSKP1_HUMANPolymorphism11538034AF1014L

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

(-) PROSITE Motifs  (2, 2)

Asymmetric Unit (2, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1CKS_1PS00944 Cyclin-dependent kinases regulatory subunits signature 1.CKS1_HUMAN8-26  1C:3008-3026
2CKS_2PS00945 Cyclin-dependent kinases regulatory subunits signature 2.CKS1_HUMAN60-70  1C:3060-3070
Biological Unit 1 (2, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1CKS_1PS00944 Cyclin-dependent kinases regulatory subunits signature 1.CKS1_HUMAN8-26  1C:3008-3026
2CKS_2PS00945 Cyclin-dependent kinases regulatory subunits signature 2.CKS1_HUMAN60-70  1C:3060-3070
Biological Unit 2 (2, 4)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1CKS_1PS00944 Cyclin-dependent kinases regulatory subunits signature 1.CKS1_HUMAN8-26  2C:3008-3026
2CKS_2PS00945 Cyclin-dependent kinases regulatory subunits signature 2.CKS1_HUMAN60-70  2C:3060-3070
Biological Unit 3 (2, 4)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1CKS_1PS00944 Cyclin-dependent kinases regulatory subunits signature 1.CKS1_HUMAN8-26  2C:3008-3026
2CKS_2PS00945 Cyclin-dependent kinases regulatory subunits signature 2.CKS1_HUMAN60-70  2C:3060-3070

(-) Exons   (16, 16)

Asymmetric Unit (16, 16)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1bENST000002742551bENSE00001852758chr5:36152169-36152372204SKP2_HUMAN1-330--
1.2aENST000002742552aENSE00001130153chr5:36152873-36153144272SKP2_HUMAN3-94920--
1.3ENST000002742553ENSE00001006180chr5:36163747-36163858112SKP2_HUMAN94-131381B:2095-213137
1.4ENST000002742554ENSE00001006177chr5:36166621-36166764144SKP2_HUMAN131-179491B:2131-217949
1.5ENST000002742555ENSE00001006179chr5:36168415-36168549135SKP2_HUMAN179-224461B:2179-222446
1.6bENST000002742556bENSE00001006176chr5:36170446-3617054499SKP2_HUMAN224-257341B:2224-225734
1.7ENST000002742557ENSE00002147593chr5:36171705-36171835131SKP2_HUMAN257-301451B:2257-230145
1.8ENST000002742558ENSE00000971194chr5:36177067-3617711852SKP2_HUMAN301-318181B:2301-231818
1.9ENST000002742559ENSE00000971195chr5:36177287-36177394108SKP2_HUMAN318-354371B:2318-235437
1.12cENST0000027425512cENSE00001082238chr5:36181920-361844212502SKP2_HUMAN354-424711B:2354-241966

2.1cENST000003089871cENSE00001200321chr1:154947175-154947280106CKS1_HUMAN1-20201C:3005-302016
2.4bENST000003089874bENSE00001200312chr1:154950463-154950590128CKS1_HUMAN20-63441C:3020-306344
2.5fENST000003089875fENSE00001848352chr1:154951201-154951725525CKS1_HUMAN63-79171C:3063-307311

3.2aENST000003534112aENSE00001169035chr5:133512729-133512546184SKP1_HUMAN-00--
3.5bENST000003534115bENSE00000763313chr5:133509713-13350961797SKP1_HUMAN1-33331A:1002-103332
3.7ENST000003534117ENSE00002156080chr5:133502934-13350286174SKP1_HUMAN33-57251A:1033-1051 (gaps)25
3.8dENST000003534118dENSE00000763311chr5:133496821-133496678144SKP1_HUMAN58-105481A:1052-1105 (gaps)54
3.9dENST000003534119dENSE00001328116chr5:133494286-133494146141SKP1_HUMAN106-152471A:1106-115247
3.9lENST000003534119lENSE00001291683chr5:133493459-1334920821378SKP1_HUMAN153-163111A:1153-11608

(-) Sequences/Alignments

Asymmetric Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
(details for a mapped element are shown in a popup box when the mouse pointer rests over it)
Chain A from PDB  Type:PROTEIN  Length:143
 aligned with SKP1_HUMAN | P63208 from UniProtKB/Swiss-Prot  Length:163

    Alignment length:159
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151         
          SKP1_HUMAN      2 PSIKLQSSDGEIFEVDVEIAKQSVTIKTMLEDLGMDDEGDDDPVPLPNVNAAILKKVIQWCTHHKDDPPPPEDDENKEKRTDDIPVWDQEFLKVDQGTLFELILAANYLDIKGLLDVTCKTVANMIKGKTPEEIRKTFNIKNDFTEEEEAQVRKENQWC  160
               SCOP domains d2assa1 A:1002-1059 Cyclin A/CDK2-as      sociated p45, Skp1    -------------------d2assa2 A:1085-1160 Cyclin A/CDK2-associated p45, Skp1                       SCOP domains
               CATH domains 2assA00 A:1002-1160 Potassium Channe      l Kv1.1; Chain A                                                                                                      CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeee.....eeeeehhhhh.hhhhhhhhhh....------.ee....hhhhhhhhhhhhhhh.....----------.....hhhhhhhh..hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....hhhhhhhhh.........hhhhhhh..... Sec.struct. author
                 SAPs(SNPs) ------------L-------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
           Transcript 3 (1) Exon 3.5b  PDB: A:1002-1033     ------------------------Exon 3.8d  PDB: A:1052-1105 (gaps)              Exon 3.9d  PDB: A:1106-1152 UniProt: 106-152   3.9l     Transcript 3 (1)
           Transcript 3 (2) -------------------------------Exon 3.7 UniProt: 33-57  ------------------------------------------------------------------------------------------------------- Transcript 3 (2)
                2ass A 1002 ASIKLQSSDGEIFEVDVEIAKQSVTIKTMLEDLGMD------PVPLPNVNAAILKKVIQWCTHHKDDPP----------RTDDIPVWDQEFLKVDQGTLFELILAANYLDIKGLLDVTCKTVANMIKGKTPEEIRKTFNIKNDFTEEEEAQVRKENQWC 1160
                                  1011      1021      1031     |   -  |   1045      1055        |-      1081      1091      1101      1111      1121      1131      1141      1151         
                                                            1037   1038                      1064       1081                                                                               

Chain B from PDB  Type:PROTEIN  Length:325
 aligned with SKP2_HUMAN | Q13309 from UniProtKB/Swiss-Prot  Length:424

    Alignment length:325
                                   104       114       124       134       144       154       164       174       184       194       204       214       224       234       244       254       264       274       284       294       304       314       324       334       344       354       364       374       384       394       404       414     
          SKP2_HUMAN     95 VSWDSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQTLDLTGKNLHPDVTGRLLSQGVIAFRCPRSFMDQPLAEHFSPFRVQHMDLSNSVIEVSTLHGILSQCSKLQNLSLEGLRLSDPIVNTLAKNSNLVRLNLSGCSGFSEFALQTLLSSCSRLDELNLSWCFDFTEKHVQVAVAHVSETITQLNLSGYRKNLQKSDLSTLVRRCPNLVHLDLSDSVMLKNDCFQEFFQLNYLQHLSLSRCYDIIPETLLELGEIPTLKTLQVFGIVPDGTLQLLKEALPHLQINCSHFTTIARPTIGNKKNQEIWGIKCRLTLQ  419
               SCOP domains d2assb1 B:2095-2133 Skp2               d2assb2 B:2134-2419 Cyclin A/CDK2-associated p19, Skp2                                                                                                                                                                                                                                         SCOP domains
               CATH domains 2assB00 B:2095-2419 Ribonuclease Inhibitor                                                                                                                                                                                                                                                                                            CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ......hhhhhhhhhh..hhhhhhhhh.....hhhhhh......eee......hhhhhhhhhh....eee....ee..............eee....eehhhhhhhhhh......eee......hhhhhhhhh......eee.......hhhhhhhhhhhh....eee.......hhhhhhhhhhhh.....eee........hhhhhhhhhhhh....eee.......hhhhhhhhhh.....eee.......hhhhhhhhhhh....eee........hhhhhhhhh...ee...................ee..ee..ee.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
           Transcript 1 (1) Exon 1.3  PDB: B:2095-2131           -----------------------------------------------Exon 1.5  PDB: B:2179-2224 UniProt: 179-224   --------------------------------Exon 1.7  PDB: B:2257-2301 UniProt: 257-301  ----------------------------------------------------Exon 1.12c  PDB: B:2354-2419 UniProt: 354-424 [INCOMPLETE]         Transcript 1 (1)
           Transcript 1 (2) ------------------------------------Exon 1.4  PDB: B:2131-2179 UniProt: 131-179      --------------------------------------------Exon 1.6b  PDB: B:2224-2257       -------------------------------------------Exon 1.8          ----------------------------------------------------------------------------------------------------- Transcript 1 (2)
           Transcript 1 (3) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Exon 1.9  PDB: B:2318-2354           ----------------------------------------------------------------- Transcript 1 (3)
                2ass B 2095 VSWDSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQTLDLTGKNLHPDVTGRLLSQGVIAFRCPRSFMDQPLAEHFSPFRVQHMDLSNSVIEVSTLHGILSQCSKLQNLSLEGLRLSDPIVNTLAKNSNLVRLNLSGCSGFSEFALQTLLSSCSRLDELNLSWCFDFTEKHVQVAVAHVSETITQLNLSGYRKNLQKSDLSTLVRRCPNLVHLDLSDSVMLKNDCFQEFFQLNYLQHLSLSRCYDIIPETLLELGEIPTLKTLQVFGIVPDGTLQLLKEALPHLQINCSHFTTIARPTIGNKKNQEIWGIKCRLTLQ 2419
                                  2104      2114      2124      2134      2144      2154      2164      2174      2184      2194      2204      2214      2224      2234      2244      2254      2264      2274      2284      2294      2304      2314      2324      2334      2344      2354      2364      2374      2384      2394      2404      2414     

Chain C from PDB  Type:PROTEIN  Length:69
 aligned with CKS1_HUMAN | P61024 from UniProtKB/Swiss-Prot  Length:79

    Alignment length:69
                                    14        24        34        44        54        64         
          CKS1_HUMAN      5 QIYYSDKYDDEEFEYRHVMLPKDIAKLVPKTHLMSESEWRNLGVQQSQGWVHYMIHEPEPHILLFRRPL   73
               SCOP domains d2assc_ C: CksHs1                                                     SCOP domains
               CATH domains 2assC00 C:3005-3073 Cyclin-Dependent Kinase Subunit Type 2            CATH domains
               Pfam domains --------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..ee...ee...eeeeeee....hhhhh......hhhhhhhhh.......eeeee......eeeeeee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---CKS_1 UniProt: 8-26---------------------------------CKS_2      --- PROSITE
           Transcript 2 (1) Exon 2.1c       ------------------------------------------Exon 2.5f   Transcript 2 (1)
           Transcript 2 (2) ---------------Exon 2.4b  PDB: C:3020-3063 UniProt: 20-63  ---------- Transcript 2 (2)
                2ass C 3005 QIYYSDKYDDEEFEYRHVMLPKDIAKLVPKTHLMSESEWRNLGVQQSQGWVHYMIHEPEPHILLFRRPL 3073
                                  3014      3024      3034      3044      3054      3064         

   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
    → Modified Residue (blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (5, 5)

Asymmetric Unit

(-) CATH Domains  (3, 3)

Asymmetric Unit
(-)
Class: Alpha Beta (26913)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2ASS)

(-) Gene Ontology  (42, 57)

Asymmetric Unit(hide GO term definitions)
Chain A   (SKP1_HUMAN | P63208)
molecular function
    GO:0008013    beta-catenin binding    Interacting selectively and non-covalently with the beta subunit of the catenin complex.
    GO:0097602    cullin family protein binding    Interacting selectively and non-covalently with any member of the cullin family, hydrophobic proteins that act as scaffolds for ubiquitin ligases (E3).
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
    GO:0061630    ubiquitin protein ligase activity    Catalysis of the transfer of ubiquitin to a substrate protein via the reaction X-ubiquitin + S -> X + S-ubiquitin, where X is either an E2 or E3 enzyme, the X-ubiquitin linkage is a thioester bond, and the S-ubiquitin linkage is an amide bond: an isopeptide bond between the C-terminal glycine of ubiquitin and the epsilon-amino group of lysine residues in the substrate or, in the linear extension of ubiquitin chains, a peptide bond the between the C-terminal glycine and N-terminal methionine of ubiquitin residues.
    GO:0004842    ubiquitin-protein transferase activity    Catalysis of the transfer of ubiquitin from one protein to another via the reaction X-Ub + Y --> Y-Ub + X, where both X-Ub and Y-Ub are covalent linkages.
biological process
    GO:0038095    Fc-epsilon receptor signaling pathway    A series of molecular signals initiated by the binding of the Fc portion of immunoglobulin E (IgE) to an Fc-epsilon receptor on the surface of a signal-receiving cell, and ending with regulation of a downstream cellular process, e.g. transcription. The Fc portion of an immunoglobulin is its C-terminal constant region.
    GO:0000086    G2/M transition of mitotic cell cycle    The mitotic cell cycle transition by which a cell in G2 commits to M phase. The process begins when the kinase activity of M cyclin/CDK complex reaches a threshold high enough for the cell cycle to proceed. This is accomplished by activating a positive feedback loop that results in the accumulation of unphosphorylated and active M cyclin/CDK complex.
    GO:0038061    NIK/NF-kappaB signaling    The process in which a signal is passed on to downstream components within the cell through the NIK-dependent processing and activation of NF-KappaB. Begins with activation of the NF-KappaB-inducing kinase (NIK), which in turn phosphorylates and activates IkappaB kinase alpha (IKKalpha). IKKalpha phosphorylates the NF-Kappa B2 protein (p100) leading to p100 processing and release of an active NF-KappaB (p52).
    GO:0031146    SCF-dependent proteasomal ubiquitin-dependent protein catabolic process    The chemical reactions and pathways resulting in the breakdown of a protein or peptide by hydrolysis of its peptide bonds, initiated by the covalent attachment of ubiquitin, with ubiquitin-protein ligation catalyzed by an SCF (Skp1/Cul1/F-box protein) complex, and mediated by the proteasome.
    GO:0050852    T cell receptor signaling pathway    A series of molecular signals initiated by the cross-linking of an antigen receptor on a T cell.
    GO:0016055    Wnt signaling pathway    The series of molecular signals initiated by binding of a Wnt protein to a frizzled family receptor on the surface of the target cell and ending with a change in cell state.
    GO:0035518    histone H2A monoubiquitination    The modification of histone H2A by addition of a single ubiquitin group.
    GO:0051437    positive regulation of ubiquitin-protein ligase activity involved in regulation of mitotic cell cycle transition    Any process that activates, maintains or increases the rate of ubiquitin ligase activity that contributes to the regulation of the mitotic cell cycle phase transition.
    GO:0043161    proteasome-mediated ubiquitin-dependent protein catabolic process    The chemical reactions and pathways resulting in the breakdown of a protein or peptide by hydrolysis of its peptide bonds, initiated by the covalent attachment of ubiquitin, and mediated by the proteasome.
    GO:0000209    protein polyubiquitination    Addition of multiple ubiquitin groups to a protein, forming a ubiquitin chain.
    GO:0016567    protein ubiquitination    The process in which one or more ubiquitin groups are added to a protein.
    GO:0002223    stimulatory C-type lectin receptor signaling pathway    Any series of molecular signals generated as a consequence of binding to a C-type lectin receptor capable of cellular activation.
    GO:0051403    stress-activated MAPK cascade    A series of molecular signals in which a stress-activated MAP kinase cascade relays one or more of the signals; MAP kinase cascades involve at least three protein kinase activities and culminate in the phosphorylation and activation of a MAP kinase.
    GO:0006511    ubiquitin-dependent protein catabolic process    The chemical reactions and pathways resulting in the breakdown of a protein or peptide by hydrolysis of its peptide bonds, initiated by the covalent attachment of a ubiquitin group, or multiple ubiquitin groups, to the protein.
cellular component
    GO:0031467    Cul7-RING ubiquitin ligase complex    A ubiquitin ligase complex in which a cullin from the Cul7 subfamily and a RING domain protein form the catalytic core; substrate specificity is conferred by a Skp1 linker and an F-box protein.
    GO:0031519    PcG protein complex    A chromatin-associated multiprotein complex containing Polycomb Group proteins. In Drosophila, Polycomb group proteins are involved in the long-term maintenance of gene repression, and PcG protein complexes associate with Polycomb group response elements (PREs) in target genes to regulate higher-order chromatin structure.
    GO:0019005    SCF ubiquitin ligase complex    A ubiquitin ligase complex in which a cullin from the Cul1 subfamily and a RING domain protein form the catalytic core; substrate specificity is conferred by a Skp1 adaptor and an F-box protein. SCF complexes are involved in targeting proteins for degradation by the proteasome. The best characterized complexes are those from yeast and mammals (with core subunits named Cdc53/Cul1, Rbx1/Hrt1/Roc1).
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0005829    cytosol    The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
    GO:0070062    extracellular exosome    A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
    GO:0005654    nucleoplasm    That part of the nuclear content other than the chromosomes or the nucleolus.
    GO:0005634    nucleus    A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

Chain B   (SKP2_HUMAN | Q13309)
molecular function
    GO:0042802    identical protein binding    Interacting selectively and non-covalently with an identical protein or proteins.
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
    GO:0061630    ubiquitin protein ligase activity    Catalysis of the transfer of ubiquitin to a substrate protein via the reaction X-ubiquitin + S -> X + S-ubiquitin, where X is either an E2 or E3 enzyme, the X-ubiquitin linkage is a thioester bond, and the S-ubiquitin linkage is an amide bond: an isopeptide bond between the C-terminal glycine of ubiquitin and the epsilon-amino group of lysine residues in the substrate or, in the linear extension of ubiquitin chains, a peptide bond the between the C-terminal glycine and N-terminal methionine of ubiquitin residues.
    GO:0004842    ubiquitin-protein transferase activity    Catalysis of the transfer of ubiquitin from one protein to another via the reaction X-Ub + Y --> Y-Ub + X, where both X-Ub and Y-Ub are covalent linkages.
biological process
    GO:0000082    G1/S transition of mitotic cell cycle    The mitotic cell cycle transition by which a cell in G1 commits to S phase. The process begins with the build up of G1 cyclin-dependent kinase (G1 CDK), resulting in the activation of transcription of G1 cyclins. The process ends with the positive feedback of the G1 cyclins on the G1 CDK which commits the cell to S phase, in which DNA replication is initiated.
    GO:0000086    G2/M transition of mitotic cell cycle    The mitotic cell cycle transition by which a cell in G2 commits to M phase. The process begins when the kinase activity of M cyclin/CDK complex reaches a threshold high enough for the cell cycle to proceed. This is accomplished by activating a positive feedback loop that results in the accumulation of unphosphorylated and active M cyclin/CDK complex.
    GO:0031145    anaphase-promoting complex-dependent catabolic process    The chemical reactions and pathways resulting in the breakdown of a protein or peptide by hydrolysis of its peptide bonds, initiated by the covalent attachment of ubiquitin, with ubiquitin-protein ligation catalyzed by the anaphase-promoting complex, and mediated by the proteasome.
    GO:0008283    cell proliferation    The multiplication or reproduction of cells, resulting in the expansion of a cell population.
    GO:0071460    cellular response to cell-matrix adhesion    Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of cell-matrix adhesion.
    GO:0033148    positive regulation of intracellular estrogen receptor signaling pathway    Any process that activates or increases the frequency, rate or extent of the activity of an intracellular estrogen receptor signaling pathway.
    GO:1902916    positive regulation of protein polyubiquitination    Any process that activates or increases the frequency, rate or extent of protein polyubiquitination.
    GO:0048661    positive regulation of smooth muscle cell proliferation    Any process that activates or increases the rate or extent of smooth muscle cell proliferation.
    GO:0000209    protein polyubiquitination    Addition of multiple ubiquitin groups to a protein, forming a ubiquitin chain.
    GO:0016567    protein ubiquitination    The process in which one or more ubiquitin groups are added to a protein.
    GO:0042981    regulation of apoptotic process    Any process that modulates the occurrence or rate of cell death by apoptotic process.
    GO:0051726    regulation of cell cycle    Any process that modulates the rate or extent of progression through the cell cycle.
    GO:0006511    ubiquitin-dependent protein catabolic process    The chemical reactions and pathways resulting in the breakdown of a protein or peptide by hydrolysis of its peptide bonds, initiated by the covalent attachment of a ubiquitin group, or multiple ubiquitin groups, to the protein.
cellular component
    GO:0019005    SCF ubiquitin ligase complex    A ubiquitin ligase complex in which a cullin from the Cul1 subfamily and a RING domain protein form the catalytic core; substrate specificity is conferred by a Skp1 adaptor and an F-box protein. SCF complexes are involved in targeting proteins for degradation by the proteasome. The best characterized complexes are those from yeast and mammals (with core subunits named Cdc53/Cul1, Rbx1/Hrt1/Roc1).
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0005829    cytosol    The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
    GO:0005730    nucleolus    A small, dense body one or more of which are present in the nucleus of eukaryotic cells. It is rich in RNA and protein, is not bounded by a limiting membrane, and is not seen during mitosis. Its prime function is the transcription of the nucleolar DNA into 45S ribosomal-precursor RNA, the processing of this RNA into 5.8S, 18S, and 28S components of ribosomal RNA, and the association of these components with 5S RNA and proteins synthesized outside the nucleolus. This association results in the formation of ribonucleoprotein precursors; these pass into the cytoplasm and mature into the 40S and 60S subunits of the ribosome.
    GO:0005654    nucleoplasm    That part of the nuclear content other than the chromosomes or the nucleolus.
    GO:0005634    nucleus    A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

Chain C   (CKS1_HUMAN | P61024)
molecular function
    GO:0016538    cyclin-dependent protein serine/threonine kinase regulator activity    Modulates the activity of a cyclin-dependent protein serine/threonine kinase, enzymes of the protein kinase family that are regulated through association with cyclins and other proteins.
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
biological process
    GO:0007049    cell cycle    The progression of biochemical and morphological phases and events that occur in a cell during successive cell replication or nuclear replication events. Canonically, the cell cycle comprises the replication and segregation of genetic material followed by the division of the cell, but in endocycles or syncytial cells nuclear replication or nuclear division may not be followed by cell division.
    GO:0051301    cell division    The process resulting in division and partitioning of components of a cell to form more cells; may or may not be accompanied by the physical separation of a cell into distinct, individually membrane-bounded daughter cells.
    GO:0008283    cell proliferation    The multiplication or reproduction of cells, resulting in the expansion of a cell population.
    GO:0000079    regulation of cyclin-dependent protein serine/threonine kinase activity    Any process that modulates the frequency, rate or extent of cyclin-dependent protein serine/threonine kinase activity.
cellular component
    GO:0005654    nucleoplasm    That part of the nuclear content other than the chromosomes or the nucleolus.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        CKS1_HUMAN | P610241buh 1dks 1dkt 2ast 4yc6
        SKP1_HUMAN | P632081fqv 1fs1 1fs2 1ldk 1p22 2ast 2e31 2e32 2ovp 2ovq 2ovr 3l2o 3wso 4i6j 5ibk 5jh5 5k35
        SKP2_HUMAN | Q133091fqv 1fs1 1fs2 1ldk 2ast

(-) Related Entries Specified in the PDB File

1fqv CRYSTAL STRUCTURE OF SKP1-SKP2
2ast CRYSTAL STRUCTURE OF SKP1-SKP2-CKS1 IN COMPLEX WITH A P27 PEPTIDE