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(-) Description

Title :  SOLUTION STRUCTURE OF THE MAIN ALPHA-AMYLASE INHIBITOR FROM AMARANTH SEEDS
 
Authors :  J. C. Martins, M. Enassar, R. Willem, J. M. Wieruzeski, G. Lippens, S. J. Wodak
Date :  02 Jan 01  (Deposition) - 18 Jul 01  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (20x)
Keywords :  Cysteine Knot, Plant Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  J. C. Martins, M. Enassar, R. Willem, J. M. Wieruzeski, G. Lippens, S. J. Wodak
Solution Structure Of The Main Alpha-Amylase Inhibitor From Amaranth Seeds.
Eur. J. Biochem. V. 268 2379 2001
PubMed-ID: 11298757  |  Reference-DOI: 10.1046/J.1432-1327.2001.02118.X
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - ALPHA-AMYLASE INHIBITOR AAI
    Chains: A
    Organ: SEEDS
    Organism Common: GRAIN AMARANTH
    Organism Scientific: AMARANTHUS HYPOCHONDRIACUS
    Organism Taxid: 28502

 Structural Features

(-) Chains, Units

  
NMR Structure (20x): 

Summary Information (see also Sequences/Alignments below)

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

(no "Ligand,Modified Residues,Ions" information available for 1HTX)

(-) Sites  (0, 0)

(no "Site" information available for 1HTX)

(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:1 -A:18
2A:8 -A:23
3A:17 -A:31

(-) Cis Peptide Bonds  (1, 20)

NMR Structure
No.ModelResidues
11, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20Glu A:19 -Pro A:20

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 1HTX)

(-) Exons   (0, 0)

(no "Exon" information available for 1HTX)

(-) Sequences/Alignments

NMR Structure
   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:32
 aligned with IAAI_AMAHP | P80403 from UniProtKB/Swiss-Prot  Length:32

    Alignment length:32
                                    10        20        30  
            IAAI_AMAHP    1 CIPKWNRCGPKMDGVPCCEPYTCTSDYYGNCS 32
               SCOP domains d1htxa_ A:                       SCOP domains
               CATH domains -------------------------------- CATH domains
               Pfam domains -------------------------------- Pfam domains
         Sec.struct. author ......ee....................ee.. Sec.struct. author
                 SAPs(SNPs) -------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------- PROSITE
                 Transcript -------------------------------- Transcript
                  1htx A  1 CIPKWNRCGPKMDGVPCCEPYTCTSDYYGNCS 32
                                    10        20        30
   Legend:   → Mismatch (orange background)
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  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (1, 1)

NMR Structure
(-)
Class: Small proteins (3458)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 1HTX)

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (4, 4)

NMR Structure(hide GO term definitions)
Chain A   (IAAI_AMAHP | P80403)
molecular function
    GO:0015066    alpha-amylase inhibitor activity    Stops, prevents or reduces the activity of alpha-amylase.
    GO:0004866    endopeptidase inhibitor activity    Stops, prevents or reduces the activity of an endopeptidase, any enzyme that hydrolyzes nonterminal peptide bonds in polypeptides.
biological process
    GO:0043086    negative regulation of catalytic activity    Any process that stops or reduces the activity of an enzyme.
    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.

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  Cis Peptide Bonds
    Glu A:19 - Pro A:20   [ RasMol ]  
 

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  1htx
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 Related Entries

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

UniProtKB/Swiss-Prot
        IAAI_AMAHP | P80403: 1clv 1qfd

(-) Related Entries Specified in the PDB File

1clv CRYSTAL STRUCTURE OF THE AMARANTH ALPHA-AMYLASE INHIBITOR IN COMPLEX WITH THE ALPHA-AMYLASE FROM THE YELLOW MEALWORM AT 2.00 A RESOLUTION
1qfd ALPHA-AMYLASE INHIBITOR INDEPENDANTLY DETERMINED NMR SOLUTION STRUCTURE