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(-) Description

Title :  COMPLEX OF TROPONIN C WITH A 47 RESIDUE (1-47) FRAGMENT OF TROPONIN I
 
Authors :  D. G. Vassylyev, S. Takeda, S. Wakatsuki, K. Maeda, Y. Maeda
Date :  13 Jan 98  (Deposition) - 15 Jul 98  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.30
Chains :  Asym./Biol. Unit :  A,B
Keywords :  Troponin, Muscle Contraction Regulation, Complex (Skeletal Muscle/Muscle Protein) (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  D. G. Vassylyev, S. Takeda, S. Wakatsuki, K. Maeda, Y. Maeda
Crystal Structure Of Troponin C In Complex With Troponin I Fragment At 2. 3-A Resolution.
Proc. Natl. Acad. Sci. Usa V. 95 4847 1998
PubMed-ID: 9560191  |  Reference-DOI: 10.1073/PNAS.95.9.4847
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - TROPONIN C
    Chains: A
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Cellular Location: CYTOPLASM
    Expression System Plasmid: PMALC2
    Expression System Strain: K
    Expression System Taxid: 562
    Organ: SKELETAL
    Organism Common: RABBIT
    Organism Scientific: ORYCTOLAGUS CUNICULUS
    Organism Taxid: 9986
    Tissue: FAST SKELETAL MUSCLE
 
Molecule 2 - TROPONIN I
    Chains: B
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Cellular Location: INCLUSION BODY
    Expression System Plasmid: PTRC
    Expression System Strain: K
    Expression System Taxid: 562
    Fragment: RESIDUES 1 - 47
    Organ: SKELETAL
    Organism Common: RABBIT
    Organism Scientific: ORYCTOLAGUS CUNICULUS
    Organism Taxid: 9986
    Tissue: FAST SKELETAL MUSCLE

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit : AB

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 2)

Asymmetric/Biological Unit (1, 2)
No.NameCountTypeFull Name
1CA2Ligand/IonCALCIUM ION

(-) Sites  (2, 2)

Asymmetric Unit (2, 2)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREASP A:103 , ASN A:105 , ASP A:107 , TYR A:109 , GLU A:114BINDING SITE FOR RESIDUE CA A 160
2AC2SOFTWAREASP A:139 , ASN A:141 , ASP A:143 , ARG A:145 , GLU A:150BINDING SITE FOR RESIDUE CA A 161

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 1A2X)

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1A2X)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1A2X)

(-) PROSITE Motifs  (2, 8)

Asymmetric/Biological Unit (2, 8)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1EF_HAND_2PS50222 EF-hand calcium-binding domain profile.TNNC2_RABIT15-50
51-86
91-126
127-160		  4A:14-49
A:50-85
A:90-125
A:126-159
2EF_HAND_1PS00018 EF-hand calcium-binding domain.TNNC2_RABIT28-40
64-76
104-116
140-152		  4A:27-39
A:63-75
A:103-115
A:139-151

(-) Exons   (0, 0)

(no "Exon" information available for 1A2X)

(-) Sequences/Alignments

Asymmetric/Biological 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:158
 aligned with TNNC2_RABIT | P02586 from UniProtKB/Swiss-Prot  Length:160

    Alignment length:158
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152        
          TNNC2_RABIT     3 DQQAEARSYLSEEMIAEFKAAFDMFDADGGGDISVKELGTVMRMLGQTPTKEELDAIIEEVDEDGSGTIDFEEFLVMMVRQMKEDAKGKSEEELAECFRIFDRNADGYIDAEELAEIFRASGEHVTDEEIESLMKDGDKNNDGRIDFDEFLKMMEGVQ 160
               SCOP domains d1a2xa_ A: Troponin C                                                                                                                                          SCOP domains
               CATH domains 1a2xA00 A:2-159 EF-hand                                                                                                                                        CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..hhhhhhh..hhhhhhhhhhhhhh......eeehhhhhhhhhh......hhhhhhhhhhh......eeehhhhhhhhhhhhhh......hhhhhhhhhhh......eeehhhhhhh.........hhhhhhhhhhh......eeehhhhhhhh.... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ------------EF_HAND_2  PDB: A:14-49             EF_HAND_2  PDB: A:50-85             ----EF_HAND_2  PDB: A:90-125            EF_HAND_2  PDB: A:126-159          PROSITE (1)
                PROSITE (2) -------------------------EF_HAND_1    -----------------------EF_HAND_1    ---------------------------EF_HAND_1    -----------------------EF_HAND_1    -------- PROSITE (2)
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1a2x A   2 DQQAEARSYLSEEMIAEFKAAFDMFDADGGGDISVKELGTVMRMLGQTPTKEELDAIIEEVDEDGSGTIDFEEFLVMMVRQMKEDAKGKSEEELAECFRIFDRNADGYIDAEELAEIFRASGEHVTDEEIESLMKDGDKNNDGRIDFDEFLKMMEGVQ 159
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151        


Chain B from PDB  Type:PROTEIN  Length:31
 aligned with TNNI2_RABIT | P02643 from UniProtKB/Swiss-Prot  Length:182

    Alignment length:31
                                    13        23        33 
          TNNI2_RABIT     4 EEKRNRAITARRQHLKSVMLQIAATELEKEE  34
               SCOP domains d1a2xb_ B: Troponin I fragments SCOP domains
               CATH domains 1a2xB00 B:3-33                  CATH domains
               Pfam domains ------------------------------- Pfam domains
         Sec.struct. author ..hhhhhhhhhhhhhhhhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------- PROSITE
                 Transcript ------------------------------- Transcript
                 1a2x B   3 EEKRNRAITARRQHLKSVMLQIAATELEKEE  33
                                    12        22        32
   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, 2)

Asymmetric/Biological Unit
(-)
Class: All alpha proteins (14657)
(-)
Class: Peptides (792)

(-) CATH Domains  (2, 2)

Asymmetric/Biological Unit
(-)
Class: Mainly Alpha (13335)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1A2X)

(-) Gene Ontology  (5, 7)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (TNNC2_RABIT | P02586)
molecular function
    GO:0005509    calcium ion binding    Interacting selectively and non-covalently with calcium ions (Ca2+).
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0031014    troponin T binding    Interacting selectively and non-covalently with troponin T, the tropomyosin-binding subunit of the troponin complex.

Chain B   (TNNI2_RABIT | P02643)
molecular function
    GO:0003779    actin binding    Interacting selectively and non-covalently with monomeric or multimeric forms of actin, including actin filaments.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0031014    troponin T binding    Interacting selectively and non-covalently with troponin T, the tropomyosin-binding subunit of the troponin complex.
cellular component
    GO:0005861    troponin complex    A complex of accessory proteins (typically troponin T, troponin I and troponin C) found associated with actin in muscle thin filaments; involved in calcium regulation of muscle contraction.

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  TNNI2_RABIT | P02643
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 Related Entries

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

UniProtKB/Swiss-Prot
        TNNC2_RABIT | P02586: 1tcf 1tn4 1tnc 2tn4
        TNNI2_RABIT | P02643: 1ew7 1npq

(-) Related Entries Specified in the PDB File

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