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(-) Description

Title :  CRYSTAL STRUCTURE OF A CD8AB HETERODIMER
 
Authors :  H. C. Chang, K. Tan, J. Ouyang, E. Parisini, J. H. Liu, Y. Le, X. Wang, E. L. J. H. Wang
Date :  25 Aug 05  (Deposition) - 27 Dec 05  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.40
Chains :  Asym. Unit :  A,B,C,D,E,F
Biol. Unit 1:  A,B,E  (1x)
Biol. Unit 2:  C,D,F  (1x)
Keywords :  Cd8Ab, Cd8Aa, Mhc, Immune System (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  H. C. Chang, K. Tan, J. Ouyang, E. Parisini, J. H. Liu, Y. Le, X. Wang, E. L. Reinherz, J. H. Wang
Structural And Mutational Analyses Of A Cd8Alphabeta Heterodimer And Comparison With The Cd8Alphaalpha Homodimer
Immunity V. 23 661 2005
PubMed-ID: 16356863  |  Reference-DOI: 10.1016/J.IMMUNI.2005.11.002

(-) Compounds

Molecule 1 - T-CELL SURFACE GLYCOPROTEIN CD8 ALPHA CHAIN
    ChainsA, C
    EngineeredYES
    Expression SystemCRICETULUS GRISEUS
    Expression System CommonCHINESE HAMSTER
    Expression System PlasmidPEE14
    Expression System StrainCHO-LEC 3.8.2.1
    Expression System Taxid10029
    Expression System Vector TypePLASMID
    FragmentCD8A ECTODOMAIN FRAGMENT
    GeneCD8A, LYT-2, LYT2
    Organism CommonHOUSE MOUSE
    Organism ScientificMUS MUSCULUS
    Organism Taxid10090
    SynonymT-CELL SURFACE GLYCOPROTEIN LYT-2
 
Molecule 2 - ARTIFACT LINKER
    ChainsE, F
    EngineeredYES
    FragmentA PEPTIDE USED TO CONNECT CD8A C-TERMINAL AND CD8B N- TERMINAL
    Other DetailsSYNTHETIC LINKER
    SyntheticYES
 
Molecule 3 - T-CELL SURFACE GLYCOPROTEIN CD8 BETA CHAIN
    ChainsB, D
    EngineeredYES
    Expression SystemCRICETULUS GRISEUS
    Expression System CommonCHINESE HAMSTER
    Expression System PlasmidPEE14
    Expression System StrainCHO-LEC 3.8.2.1
    Expression System Taxid10029
    Expression System Vector TypePLASMID
    FragmentCD8B ECTODOMAIN FRAGMENT
    GeneCD8B, LYT-3, LYT3
    Organism CommonHOUSE MOUSE
    Organism ScientificMUS MUSCULUS
    Organism Taxid10090
    SynonymT-CELL SURFACE GLYCOPROTEIN LYT-3, T-CELL MEMBRANE GLYCOPROTEIN LY-3

 Structural Features

(-) Chains, Units

  123456
Asymmetric Unit ABCDEF
Biological Unit 1 (1x)AB  E 
Biological Unit 2 (1x)  CD F

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 3)

Asymmetric Unit (1, 3)
No.NameCountTypeFull Name
1NAG3Ligand/IonN-ACETYL-D-GLUCOSAMINE
Biological Unit 1 (1, 1)
No.NameCountTypeFull Name
1NAG1Ligand/IonN-ACETYL-D-GLUCOSAMINE
Biological Unit 2 (1, 2)
No.NameCountTypeFull Name
1NAG2Ligand/IonN-ACETYL-D-GLUCOSAMINE

(-) Sites  (3, 3)

Asymmetric Unit (3, 3)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREPHE A:40 , ASN A:42 , SER A:44 , GLU A:95 , ARG E:23BINDING SITE FOR RESIDUE NAG A 242
2AC2SOFTWAREASN C:42 , SER C:44 , GLU C:95BINDING SITE FOR RESIDUE NAG C 242
3AC3SOFTWAREASN D:13BINDING SITE FOR RESIDUE NAG D 213

(-) SS Bonds  (4, 4)

Asymmetric Unit
No.Residues
1A:26 -A:102
2B:20 -B:96
3C:26 -C:102
4D:20 -D:96

(-) Cis Peptide Bonds  (6, 6)

Asymmetric Unit
No.Residues
1Phe A:10 -Pro A:11
2Thr B:4 -Pro B:5
3Ser B:101 -Pro B:102
4Phe C:10 -Pro C:11
5Thr D:4 -Pro D:5
6Ser D:101 -Pro D:102

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (2, 4)

Asymmetric Unit (2, 4)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_CD8B_MOUSE_001 *R98SCD8B_MOUSE  ---  ---B/DR77S
2UniProtVAR_CD8A_MOUSE_001 *M105VCD8A_MOUSE  ---  ---A/CM78V
   * ID not provided by source

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)
Biological Unit 1 (2, 2)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_CD8B_MOUSE_001 *R98SCD8B_MOUSE  ---  ---BR77S
2UniProtVAR_CD8A_MOUSE_001 *M105VCD8A_MOUSE  ---  ---AM78V
   * ID not provided by source

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)
Biological Unit 2 (2, 2)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_CD8B_MOUSE_001 *R98SCD8B_MOUSE  ---  ---DR77S
2UniProtVAR_CD8A_MOUSE_001 *M105VCD8A_MOUSE  ---  ---CM78V
   * ID not provided by source

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

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 2ATP)

(-) Exons   (0, 0)

(no "Exon" information available for 2ATP)

(-) 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:118
 aligned with CD8A_MOUSE | P01731 from UniProtKB/Swiss-Prot  Length:247

    Alignment length:118
                                    40        50        60        70        80        90       100       110       120       130       140        
           CD8A_MOUSE    31 APELRIFPKKMDAELGQKVDLVCEVLGSVSQGCSWLFQNSSSKLPQPTFVVYMASSHNKITWDEKLNSSKLFSAMRDTNNKYVLTLNKFSKENEGYYFCSVISNSVMYFSSVVPVLQK 148
               SCOP domains d2atpa_ A: CD8                                                                                                         SCOP domains
               CATH domains 2atpA00 A:4-121 Immunoglobulins                                                                                        CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...eeee...eee.....eeeeeee......eeeeeeee........eeeeeee.....eee..........eeeee...eeeeee........eeeeeeeee..eeee...eeeee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------V------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------- Transcript
                 2atp A   4 APELRIFPKKMDAELGQKVDLVCEVLGSVSQGCSWLFQNSSSKLPQPTFVVYMASSHNKITWDEKLNSSKLFSAMRDTNNKYVLTLNKFSKENEGYYFCSVISNSVMYFSSVVPVLQK 121
                                    13        23        33        43        53        63        73        83        93       103       113        

Chain B from PDB  Type:PROTEIN  Length:115
 aligned with CD8B_MOUSE | P10300 from UniProtKB/Swiss-Prot  Length:213

    Alignment length:115
                                    31        41        51        61        71        81        91       101       111       121       131     
           CD8B_MOUSE    22 LIQTPSSLLVQTNHTAKMSCEVKSISKLTSIYWLRERQDPKDKYFEFLASWSSSKGVLYGESVDKKRNIILESSDSRRPFLSIMNVKPEDSDFYFCATVGSPKMVFGTGTKLTVV 136
               SCOP domains d2atpb1 B:1-115 CD8                                                                                                 SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author eeee..eeee.....eeeeeee.......eeeeeeeee....eeeeeeeeee...eeee.hhhh....eeee.......eeee...hhhhheeeeeeee....eee...eeeee. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------S-------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------- Transcript
                 2atp B   1 LIQTPSSLLVQTNHTAKMSCEVKSISKLTSIYWLRERQDPKDKYFEFLASWSSSKGVLYGESVDKKRNIILESSDSRRPFLSIMNVKPEDSDFYFCATVGSPKMVFGTGTKLTVV 115
                                    10        20        30        40        50        60        70        80        90       100       110     

Chain C from PDB  Type:PROTEIN  Length:119
 aligned with CD8A_MOUSE | P01731 from UniProtKB/Swiss-Prot  Length:247

    Alignment length:119
                                    40        50        60        70        80        90       100       110       120       130       140         
           CD8A_MOUSE    31 APELRIFPKKMDAELGQKVDLVCEVLGSVSQGCSWLFQNSSSKLPQPTFVVYMASSHNKITWDEKLNSSKLFSAMRDTNNKYVLTLNKFSKENEGYYFCSVISNSVMYFSSVVPVLQKV 149
               SCOP domains d2atpc_ C: CD8                                                                                                          SCOP domains
               CATH domains 2atpC00 C:4-122 Immunoglobulins                                                                                         CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..eeeee...........eeeeeeee......eeeeeee........eeeeee......eee.hhhh....eeeeee...eeeeee...hhhh.eeeeeeeee..eeee...eee.... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------V-------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------- Transcript
                 2atp C   4 APELRIFPKKMDAELGQKVDLVCEVLGSVSQGCSWLFQNSSSKLPQPTFVVYMASSHNKITWDEKLNSSKLFSAMRDTNNKYVLTLNKFSKENEGYYFCSVISNSVMYFSSVVPVLQKV 122
                                    13        23        33        43        53        63        73        83        93       103       113         

Chain D from PDB  Type:PROTEIN  Length:112
 aligned with CD8B_MOUSE | P10300 from UniProtKB/Swiss-Prot  Length:213

    Alignment length:115
                                    31        41        51        61        71        81        91       101       111       121       131     
           CD8B_MOUSE    22 LIQTPSSLLVQTNHTAKMSCEVKSISKLTSIYWLRERQDPKDKYFEFLASWSSSKGVLYGESVDKKRNIILESSDSRRPFLSIMNVKPEDSDFYFCATVGSPKMVFGTGTKLTVV 136
               SCOP domains d2atpd_ D: CD8                                                                                                      SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eee..eeeee....eeeeee.....---.eeeeeeeee..eeeeeeeeeee...eeee.....hhh.eeee.......eeee...hhhhheeeeeeee....eee...eeeeee Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------S-------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------- Transcript
                 2atp D   1 LIQTPSSLLVQTNHTAKMSCEVKSIS---SIYWLRERQDPKDKYFEFLASWSSSKGVLYGESVDKKRNIILESSDSRRPFLSIMNVKPEDSDFYFCATVGSPKMVFGTGTKLTVV 115
                                    10        20     |  30        40        50        60        70        80        90       100       110     
                                                    26  30                                                                                     

Chain E from PDB  Type:PROTEIN  Length:7
                                       
               SCOP domains ------- SCOP domains
               CATH domains ------- CATH domains
               Pfam domains ------- Pfam domains
         Sec.struct. author ....... Sec.struct. author
                 SAPs(SNPs) ------- SAPs(SNPs)
                    PROSITE ------- PROSITE
                 Transcript ------- Transcript
                 2atp E  23 RKDGSSA  29

Chain F from PDB  Type:PROTEIN  Length:2
                                  
               SCOP domains -- SCOP domains
               CATH domains -- CATH domains
               Pfam domains -- Pfam domains
         Sec.struct. author .. Sec.struct. author
                 SAPs(SNPs) -- SAPs(SNPs)
                    PROSITE -- PROSITE
                 Transcript -- Transcript
                 2atp F  28 SA  29

   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  (2, 4)

Asymmetric Unit

(-) CATH Domains  (1, 2)

Asymmetric Unit
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (15, 22)

Asymmetric Unit(hide GO term definitions)
Chain A,C   (CD8A_MOUSE | P01731)
molecular function
    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:0042803    protein homodimerization activity    Interacting selectively and non-covalently with an identical protein to form a homodimer.
    GO:0019901    protein kinase binding    Interacting selectively and non-covalently with a protein kinase, any enzyme that catalyzes the transfer of a phosphate group, usually from ATP, to a protein substrate.
biological process
    GO:0042110    T cell activation    The change in morphology and behavior of a mature or immature T cell resulting from exposure to a mitogen, cytokine, chemokine, cellular ligand, or an antigen for which it is specific.
    GO:0002456    T cell mediated immunity    Any process involved in the carrying out of an immune response by a T cell.
    GO:0002250    adaptive immune response    An immune response mediated by cells expressing specific receptors for antigen produced through a somatic diversification process, and allowing for an enhanced secondary response to subsequent exposures to the same antigen (immunological memory).
    GO:0007166    cell surface receptor signaling pathway    A series of molecular signals initiated by activation of a receptor on the surface of a cell. The pathway begins with binding of an extracellular ligand to a cell surface receptor, or for receptors that signal in the absence of a ligand, by ligand-withdrawal or the activity of a constitutively active receptor. The pathway ends with regulation of a downstream cellular process, e.g. transcription.
    GO:0045065    cytotoxic T cell differentiation    The process in which a relatively unspecialized T cell acquires specialized features of a cytotoxic T cell.
    GO:0051607    defense response to virus    Reactions triggered in response to the presence of a virus that act to protect the cell or organism.
    GO:0002376    immune system process    Any process involved in the development or functioning of the immune system, an organismal system for calibrated responses to potential internal or invasive threats.
    GO:0050850    positive regulation of calcium-mediated signaling    Any process that activates or increases the frequency, rate or extent of calcium-mediated signaling.
cellular component
    GO:0009986    cell surface    The external part of the cell wall and/or plasma membrane.
    GO:0009897    external side of plasma membrane    The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
    GO:0016021    integral component of membrane    The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.

Chain B,D   (CD8B_MOUSE | P10300)
molecular function
    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:0002250    adaptive immune response    An immune response mediated by cells expressing specific receptors for antigen produced through a somatic diversification process, and allowing for an enhanced secondary response to subsequent exposures to the same antigen (immunological memory).
    GO:0002376    immune system process    Any process involved in the development or functioning of the immune system, an organismal system for calibrated responses to potential internal or invasive threats.
cellular component
    GO:0009986    cell surface    The external part of the cell wall and/or plasma membrane.
    GO:0009897    external side of plasma membrane    The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
    GO:0016021    integral component of membrane    The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.

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 Related Entries

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

UniProtKB/Swiss-Prot
        CD8A_MOUSE | P017311bqh 1nez 2arj 3b9k 3dmm
        CD8B_MOUSE | P103003b9k 3dmm

(-) Related Entries Specified in the PDB File

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1nez THE CRYSTAL STRUCTURE OF A TL/CD8AA COMPLEX AT 2.1A RESOLUTION:IMPLICATIONS FOR MEMORY T CELL GENERATION, CO- RECEPTOR PREFERENCE AND AFFINITY