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(-) Description

Title :  CRYSTAL STRUCTURE OF A BOWMAN-BIRK INHIBITOR FROM VIGNA UNGUICULATA SEEDS
 
Authors :  K. N. Rao, C. G. Suresh
Date :  28 Aug 07  (Deposition) - 27 Nov 07  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.50
Chains :  Asym./Biol. Unit :  A,B
Keywords :  Bowman-Birk Protease Inhibitor, Vigna Unguiculata, Plant- Pis, Protein-Protein Interactions, Serine Protease Inhibitor, Plant Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  K. N. Rao, C. G. Suresh
Bowman-Birk Protease Inhibitor From The Seeds Of Vigna Unguiculata Forms A Highly Stable Dimeric Structure.
Biochim. Biophys. Acta V. 1774 1264 2007
PubMed-ID: 17869196  |  Reference-DOI: 10.1016/J.BBAPAP.2007.07.009
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - BOWMAN-BIRK TYPE SEED TRYPSIN AND CHYMOTRYPSIN INHIBITOR
    Chains: A, B
    Organism Common: COWPEA
    Organism Scientific: VIGNA UNGUICULATA
    Organism Taxid: 3917
    Synonym: BTCI

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit : AB

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (0, 0)

(no "Ligand,Modified Residues,Ions" information available for 2R33)

(-) Sites  (0, 0)

(no "Site" information available for 2R33)

(-) SS Bonds  (14, 14)

Asymmetric/Biological Unit
No.Residues
1A:18 -A:72
2A:19 -A:34
3A:22 -A:68
4A:24 -A:32
5A:42 -A:49
6A:46 -A:61
7A:51 -A:59
8B:18 -B:72
9B:19 -B:34
10B:22 -B:68
11B:24 -B:32
12B:42 -B:49
13B:46 -B:61
14B:51 -B:59

(-) Cis Peptide Bonds  (3, 3)

Asymmetric/Biological Unit
No.Residues
1Ile A:28 -Pro A:29
2Ile B:28 -Pro B:29
3Ile B:55 -Pro B:56

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2R33)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 2R33)

(-) Exons   (0, 0)

(no "Exon" information available for 2R33)

(-) 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:55
 aligned with Q4VVG2_VIGUN | Q4VVG2 from UniProtKB/TrEMBL  Length:90

    Alignment length:57
                                                                         90          
                                    53        63        73        83      |  -       
          Q4VVG2_VIGUN   44 PCCDSCICTKSIPPQCHCTDIRLNSCHSACKSCMCTRSMPGQCRCLD----------  -
               SCOP domains d2r33a1 A:17-73 Bowman-Birk inhibitor,   BBI              SCOP domains
               CATH domains 2r33A00 A:17-73                                           CATH domains
               Pfam domains --------------------------------------------------------- Pfam domains
         Sec.struct. author .....eeee.....eeee..............eeee..--.eeee............ Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------- Transcript
                  2r33 A 17 PCCDSCVCTKSIPPQCHCTNIRLNSCHSGCKSCLCTFS--GSCRCLDIANFCYKPCK 73
                                    26        36        46       | -|       66       
                                                                54 57                


Chain B from PDB  Type:PROTEIN  Length:57
 aligned with Q4VVG2_VIGUN | Q4VVG2 from UniProtKB/TrEMBL  Length:90

    Alignment length:57
                                                                         90          
                                    53        63        73        83      |  -       
          Q4VVG2_VIGUN   44 PCCDSCICTKSIPPQCHCTDIRLNSCHSACKSCMCTRSMPGQCRCLD----------  -
               SCOP domains d2r33b_ B: automated matches                              SCOP domains
               CATH domains 2r33B00 B:17-73                                           CATH domains
           Pfam domains (1) ----------------------------Bowman-Birk_leg-2r3---------- Pfam domains (1)
           Pfam domains (2) ----------------------------Bowman-Birk_leg-2r3---------- Pfam domains (2)
           Pfam domains (3) ----------------------------Bowman-Birk_leg-2r3---------- Pfam domains (3)
           Pfam domains (4) ----------------------------Bowman-Birk_leg-2r3---------- Pfam domains (4)
         Sec.struct. author .....eee.......eee...ee.........eeee.....eeee............ Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------- Transcript
                  2r33 B 17 PCCDSCVCTKSIPPQCHCTNIRLNSCHSGCKSCLCTFSIPGSCRCLDIANFCYKPCK 73
                                    26        36        46        56        66
   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: Small proteins (3458)

(-) CATH Domains  (1, 2)

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

(-) Pfam Domains  (1, 4)

Asymmetric/Biological Unit
(-)
Clan: no clan defined [family: Bowman-Birk_leg] (11)

(-) Gene Ontology  (5, 5)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A,B   (Q4VVG2_VIGUN | Q4VVG2)
molecular function
    GO:0030414    peptidase inhibitor activity    Stops, prevents or reduces the activity of a peptidase, any enzyme that catalyzes the hydrolysis peptide bonds.
    GO:0004867    serine-type endopeptidase inhibitor activity    Stops, prevents or reduces the activity of serine-type endopeptidases, enzymes that catalyze the hydrolysis of nonterminal peptide bonds in a polypeptide chain; a serine residue (and a histidine residue) are at the active center of the enzyme.
biological process
    GO:0010951    negative regulation of endopeptidase activity    Any process that decreases the frequency, rate or extent of endopeptidase activity, the endohydrolysis of peptide bonds within proteins.
    GO:0010466    negative regulation of peptidase activity    Any process that stops or reduces the rate of peptidase activity, the hydrolysis of peptide bonds within proteins.
cellular component
    GO:0005576    extracellular region    The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.

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  Cis Peptide Bonds
    Ile A:28 - Pro A:29   [ RasMol ]  
    Ile B:28 - Pro B:29   [ RasMol ]  
    Ile B:55 - Pro B:56   [ RasMol ]  
 

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 Related Entries

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(-) Related Entries Specified in the PDB File

2ot6