2F91 - JenaLib

Title :   1.2A RESOLUTION STRUCTURE OF A CRAYFISH TRYPSIN COMPLEXED WITH A PEPTIDE INHIBITOR, SGTI

Authors :   K. Fodor, V. Harmat, C. Hetenyi, J. Kardos, J. Antal, A. Perczel, A. Patthy, G. Katona, L. Graf

Date :   05 Dec 05 (Deposition) - 18 Apr 06 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   1.20

Chains :   Asym./Biol. Unit : A,B

Keywords :   Serine Protease, Trypsin, Canonical Inhibitor, Atomic Resolution, Hydrolase/Hydrolase Inhibitor Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   K. Fodor, V. Harmat, R. Neutze, L. Szilagyi, L. Graf, G. Katona
Enzyme:Substrate Hydrogen Bond Shortening During The Acylation Phase Of Serine Protease Catalysis.
Biochemistry V. 45 2114 2006
PubMed-ID: 16475800 | Reference-DOI: 10.1021/BI0517133
(for further references see the PDB file header)

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (2, 8)

Sites (8, 8)

Asymmetric Unit (8, 8)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	GLU A:70 , ASP A:72 , VAL A:75 , GLU A:77 , GLU A:80 , HOH A:592	BINDING SITE FOR RESIDUE CD A 401
2	AC2	SOFTWARE	ASP A:135 , ASP A:178 , CL A:407 , CL A:408	BINDING SITE FOR RESIDUE CD A 402
3	AC3	SOFTWARE	GLU A:60E , HOH A:433 , HOH A:627 , HOH A:633 , HOH A:705	BINDING SITE FOR RESIDUE CD A 403
4	AC4	SOFTWARE	ASP A:21 , ASP A:60C , HOH A:595 , HOH A:597 , HOH A:687	BINDING SITE FOR RESIDUE CD A 404
5	AC5	SOFTWARE	ASP A:165 , ASP A:178 , MET A:180 , GLU A:231 , HOH A:576 , HOH A:577	BINDING SITE FOR RESIDUE CD A 405
6	AC6	SOFTWARE	GLU A:125 , HOH A:719	BINDING SITE FOR RESIDUE CD A 406
7	AC7	SOFTWARE	ASN A:93 , ASP A:135 , ARG A:169 , ASP A:178 , CD A:402 , HOH A:602	BINDING SITE FOR RESIDUE CL A 407
8	AC8	SOFTWARE	ASP A:135 , THR A:159 , PRO A:161 , ASP A:178 , LYS A:188 , CD A:402	BINDING SITE FOR RESIDUE CL A 408

SS Bonds (6, 6)

Cis Peptide Bonds (0, 0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

PROSITE Motifs (0, 0)

Exons (0, 0)

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:237
 aligned with Q52V24_ASTLP | Q52V24 from UniProtKB/TrEMBL  Length:237

    Alignment length:237
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       
        Q52V24_ASTLP      1 IVGGTDATLGEFPYQLSFQETFIGFSFHFCGASIYNENYAITAGHCAYGDDYENPSGLQIVAGELDMSVNEGSEQIITVSKIILHENFDYNLLDNDISLLKLSGSLTFNDNVAPIALPEQGHTATGDVIVTGWGTTSEGGNTPDVLQKVTVPLVSDEDCRADYGADEILDSMICAGVPEGGKDSCQGDSGGPLAASDTGSTYLAGIVSWGYGCARPGYPGVYTEVSYHVDWIKANAV  237
               SCOP domains d2f91a1 A:16-244 Trypsin(ogen)                                                                                                                                                                                                                SCOP domains
               CATH domains 2f91A01     2f91A02 A:28-120,A:234-244 Trypsin-like serine proteases                                              2f91A01 A:16-27,A:121-233 Trypsin-like serine proteases                                                         2f91A02     CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....ee........eeeeeeee..eeeeeeeeeeee..eeeehhhhh..........eeeee............eeeeeeeeee.............eeeee........................eeeeee..............eeeeeeeehhhhhhhhhh.......eeee................eeee......eeeeeeeee.........eeeee...hhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                2f91 A   16 IVGGTDATLGEFPYQLSFQETFIGFSFHFCGASIYNENYAITAGHCVYGDDYENPSGLQIVAGELDMSVNEGSEQIITVSKIILHENFDYNLLDNDISLLKLSGSLTFNDNVAPIALPEQGHTATGDVIVTGWGTTSEGGNTPDVLQKVTVPLVSDEDCRADYGADEILDSMICAGVPEGGKDSCQGDSGGPLAASDTGSTYLAGIVSWGYGCARPGYPGVYTEVSYHVDWIKANAV  244
                                    25        35  |||   42        52       60B||||    66        76        86        96       106       116       126    || 138       148||     159       169    |  178      186B       196       206       216       227       237       
                                                37A||                     60A|||||                                                                    131|            149|                   173A          186A|                                    225|                 
                                                 37B|                      60B||||                                                                     134             151                                  186B                                     227                 
                                                  37C                       60C|||                                                                                                                                                                                       
                                                                             60D||                                                                                                                                                                                       
                                                                              60E|                                                                                                                                                                                       
                                                                               60F

Chain B from PDB  Type:PROTEIN  Length:33
 aligned with SGP1_SCHGR | O46162 from UniProtKB/Swiss-Prot  Length:92

    Alignment length:33
                                    30        40        50   
          SGP1_SCHGR     21 QECTPGQTKKQDCNTCNCTPTGVWACTRKGCPP   53
               SCOP domains --------------------------------- SCOP domains
               CATH domains --------------------------------- CATH domains
               Pfam domains --------------------------------- Pfam domains
         Sec.struct. author .......eeee..eeeee.....eeee...... Sec.struct. author
                 SAPs(SNPs) --------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------- PROSITE
                 Transcript --------------------------------- Transcript
                2f91 B    2 QECTPGQTKKQDCNTCNCTPTGVWACTRKGCPP   34
                                    11        21        31

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 (1, 1)

CATH Domains (1, 2)

Pfam Domains (0, 0)

Gene Ontology (12, 12)

Asymmetric/Biological Unit(hide GO term definitions)

Chain A (Q52V24_ASTLP | Q52V24)

molecular function
	GO:0016787	hydrolase activity	Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
	GO:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
	GO:0008233	peptidase activity	Catalysis of the hydrolysis of a peptide bond. A peptide bond is a covalent bond formed when the carbon atom from the carboxyl group of one amino acid shares electrons with the nitrogen atom from the amino group of a second amino acid.
	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:0004252	serine-type endopeptidase activity	Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain by a catalytic mechanism that involves a catalytic triad consisting of a serine nucleophile that is activated by a proton relay involving an acidic residue (e.g. aspartate or glutamate) and a basic residue (usually histidine).
	GO:0008236	serine-type peptidase activity	Catalysis of the hydrolysis of peptide bonds in a polypeptide chain by a catalytic mechanism that involves a catalytic triad consisting of a serine nucleophile that is activated by a proton relay involving an acidic residue (e.g. aspartate or glutamate) and a basic residue (usually histidine).
biological process
	GO:0006508	proteolysis	The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.

Chain B (SGP1_SCHGR | O46162)

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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	2f91
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