2IT8 - JenaLib

Title :   SOLUTION STRUCTURE OF A LINEAR ANALOG OF THE CYCLIC SQUASH TRYPSIN INHIBITOR MCOTI-II

Authors :   O. Avrutina, L. Chiche, U. Diederichsen, A. Heitz, H. Kolmar

Date :   19 Oct 06 (Deposition) - 02 Oct 07 (Release) - 02 Apr 14 (Revision)

Method :   SOLUTION NMR

Resolution :   NOT APPLICABLE

Chains :   NMR Structure  : A  (30x)
NMR Structure *: A  (1x)

Keywords :   Plant Protein Analog, Knottin, Cystine-Knot, 3-10 Helix, Triple- Stranded Anti-Parallel Beta-Sheet, Plant Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   A. Heitz, O. Avrutina, D. Le-Nguyen, U. Diederichsen, J. F. Hernandez J. Gracy, H. Kolmar, L. Chiche
Knottin Cyclization: Structure And Stability Of Cyclic And Linear Squash Inhibitors Do Not Differ Significantly
To Be Published
PubMed: search
(for further references see the PDB file header)

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (1, 1)

Sites (0, 0)

SS Bonds (3, 3)

Cis Peptide Bonds (0, 0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

PROSITE Motifs (1, 1)

NMR Structure (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SQUASH_INHIBITOR	PS00286	Squash family of serine protease inhibitors signature.	ITR2_MOMCO	8-27	1	A:3-22

NMR Structure * (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SQUASH_INHIBITOR	PS00286	Squash family of serine protease inhibitors signature.	ITR2_MOMCO	8-27	1	A:3-22

Exons (0, 0)

Sequences/Alignments

NMR Structure

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
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	UniProt sequence: complete aligned part

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Chain A from PDB  Type:PROTEIN  Length:30
 aligned with ITR2_MOMCO | P82409 from UniProtKB/Swiss-Prot  Length:34

    Alignment length:30
                                                       34     
                                    15        25        |-
            ITR2_MOMCO    6 GVCPKILKKCRRDSDCPGACICRGNGYCG-  -
               SCOP domains d2it8a1 A:1-29               - SCOP domains
               CATH domains ------------------------------ CATH domains
               Pfam domains ------------------------------ Pfam domains
         Sec.struct. author .......eee.hhhhh....eee..eeee. Sec.struct. author
                 SAPs(SNPs) ------------------------------ SAPs(SNPs)
                    PROSITE --SQUASH_INHIBITOR    -------- PROSITE
                 Transcript ------------------------------ Transcript
                  2it8 A  1 GVCPKILKKCRRDSDCPGACICRGNGYCGx 30
                                    10        20        30
                                                        30-NH2

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Classification and Annotation

SCOP Domains (1, 1)

CATH Domains (0, 0)

Pfam Domains (0, 0)

Gene Ontology (6, 6)

NMR Structure(hide GO term definitions)

Chain A (ITR2_MOMCO | P82409)

molecular function
	GO:0004866	endopeptidase inhibitor activity	Stops, prevents or reduces the activity of an endopeptidase, any enzyme that hydrolyzes nonterminal peptide bonds in polypeptides.
	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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