1I4G - JenaLib

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Title :   CRYSTAL STRUCTURE OF STAPHYLOCOCCAL ENTEROTOXIN A MUTANT H187A WITH REDUCED ZN2+ AFFINITY

Authors :   M. Hakansson, P. Antonsson, P. Bjork, L. A. Svensson

Date :   21 Feb 01 (Deposition) - 28 Feb 01 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.10

Chains :   Asym. Unit : A,B
Biol. Unit 1: A  (1x)
Biol. Unit 2: B  (1x)

Keywords :   Beta-Grasp, Beta-Barrel, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   M. Hakansson, P. Antonsson, P. Bjork, L. A. Svensson
Cooperative Zinc Binding In A Staphylococcal Enterotoxin A Mutant Mimics The Sea-Mhc Class Ii Interaction
J. Biol. Inorg. Chem. V. 6 757 2001
PubMed-ID: 11713682 | Reference-DOI: 10.1007/S007750100251
(for further references see the PDB file header)

Molecule 1 - ENTEROTOXIN TYPE A
	Chains	:	A, B
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PKP889
	Expression System Strain	:	UL635
	Expression System Taxid	:	562
	Expression System Vector Type	:	PLASMID
	Mutation	:	YES
	Organism Scientific	:	STAPHYLOCOCCUS AUREUS
	Organism Taxid	:	1280
	Synonym	:	SEA

		1	2
Asymmetric Unit	:	A	B
Biological Unit 1 (1x)	:	A
Biological Unit 2 (1x)	:		B

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (2, 2)

No.	Name	Count	Type	Full Name
1	SO4	1	Ligand/Ion	SULFATE ION
2	ZN	1	Ligand/Ion	ZINC ION

Biological Unit 1 (0, 0)

No.	Name	Count	Type	Full Name
1	SO4	-1	Ligand/Ion	SULFATE ION
2	ZN	-1	Ligand/Ion	ZINC ION

Biological Unit 2 (1, 1)

No.	Name	Count	Type	Full Name
1	SO4	1	Ligand/Ion	SULFATE ION
2	ZN	-1	Ligand/Ion	ZINC ION

Asymmetric Unit (2, 2)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	HIS A:44 , HIS A:225 , ASP A:227 , HOH A:507	BINDING SITE FOR RESIDUE ZN A 460
2	AC2	SOFTWARE	TYR B:92 , GLY B:93 , TYR B:94 , SER B:206 , HOH B:1083 , HOH B:1084	BINDING SITE FOR RESIDUE SO4 B 1000

Asymmetric Unit

No.	Residues
1	A:96	-	A:106
2	B:96	-	B:106

Asymmetric Unit

No.	Residues
1	Thr B:100	-	Pro B:101

(no "SAP(SNP)/Variant" information available for 1I4G)

Asymmetric Unit (2, 4)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	STAPH_STREP_TOXIN_1	PS00277	Staphylococcal enterotoxin/Streptococcal pyrogenic exotoxin signature 1.	ETXA_STAAU	132-141	2	A:108-117 B:108-117
2	STAPH_STREP_TOXIN_2	PS00278	Staphyloccocal enterotoxin/Streptococcal pyrogenic exotoxin signature 2.	ETXA_STAAU	171-194	2	A:147-170 B:147-170

Biological Unit 1 (2, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	STAPH_STREP_TOXIN_1	PS00277	Staphylococcal enterotoxin/Streptococcal pyrogenic exotoxin signature 1.	ETXA_STAAU	132-141	1	A:108-117 -
2	STAPH_STREP_TOXIN_2	PS00278	Staphyloccocal enterotoxin/Streptococcal pyrogenic exotoxin signature 2.	ETXA_STAAU	171-194	1	A:147-170 -

Biological Unit 2 (2, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	STAPH_STREP_TOXIN_1	PS00277	Staphylococcal enterotoxin/Streptococcal pyrogenic exotoxin signature 1.	ETXA_STAAU	132-141	1	- B:108-117
2	STAPH_STREP_TOXIN_2	PS00278	Staphyloccocal enterotoxin/Streptococcal pyrogenic exotoxin signature 2.	ETXA_STAAU	171-194	1	- B:147-170

(no "Exon" information available for 1I4G)

Asymmetric 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:224
 aligned with ETXA_STAAU | P0A0L2 from UniProtKB/Swiss-Prot  Length:257

    Alignment length:224
                                    43        53        63        73        83        93       103       113       123       133       143       153       163       173       183       193       203       213       223       233       243       253    
           ETXA_STAAU    34 KDLRKKSELQGTALGNLKQIYYYNEKAKTENKESHDQFLQHTILFKGFFTDHSWYNDLLVDFDSKDIVDKYKGKKVDLYGAYYGYQCAGGTPNKTACMYGGVTLHDNNRLTEEKKVPINLWLDGKQNTVPLETVKTNKKNVTVQELDLQARRYLQEKYNLYNSDVFDGKVQRGLIVFHTSTEPSVNYDLFGAQGQYSNTLLRIYRDNKTINSENMHIDIYLYTS 257
               SCOP domains d1i4ga1 A:10-120 Staphylococcal enterotoxin A, SEA                                                             d1i4ga2 A:121-233 Staphylococcal enterotoxin A, SEA                                                               SCOP domains
               CATH domains 1i4gA02               1i4gA01 A:32-114  [code=2.40.50.110, no name defined]                              --1i4gA02 A:10-31,A:117-232  [code=3.10.20.120, no name defined]                                                      - CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....hhhhhhhhhhhhhhhhhh....eeeeeee........eeee...........eeeee..hhhhhhhhh..eeeeee.ee...........eeeee..eee....eeeeeee..eeeee..eeee......eeee.eeehhhhhhhhhhhhhhhhh...hhhhh....eeeeeee......eeee.......hhhhhhhhhh...eee....eeeeeee.. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------STAPH_STRE-----------------------------STAPH_STREP_TOXIN_2     --------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1i4g A  10 KDLRKKSELQGTALGNLKQIYYYNEKAKTENKESHDQFLQHTILFKGFFTDHSWYNDLLVDFDSKDIVDKYKGKKVDLYGAYYGYQCAGGTPNKTACMYGGVTLHDNNRLTEEKKVPINLWLDGKQNTVPLETVKTNKKNVTVQELDLQARRYLQEKYNLYNSDVFDGKVQRGLIVFATSTEPSVNYDLFGAQGQYSNTLLRIYRDNKTINSENMHIDIYLYTS 233
                                    19        29        39        49        59        69        79        89        99       109       119       129       139       149       159       169       179       189       199       209       219       229

Chain B from PDB  Type:PROTEIN  Length:226
 aligned with ETXA_STAAU | P0A0L2 from UniProtKB/Swiss-Prot  Length:257

    Alignment length:226
                                    41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251      
           ETXA_STAAU    32 NEKDLRKKSELQGTALGNLKQIYYYNEKAKTENKESHDQFLQHTILFKGFFTDHSWYNDLLVDFDSKDIVDKYKGKKVDLYGAYYGYQCAGGTPNKTACMYGGVTLHDNNRLTEEKKVPINLWLDGKQNTVPLETVKTNKKNVTVQELDLQARRYLQEKYNLYNSDVFDGKVQRGLIVFHTSTEPSVNYDLFGAQGQYSNTLLRIYRDNKTINSENMHIDIYLYTS 257
               SCOP domains d1i4gb1 B:8-120 Staphylococcal enterotoxin A, SEA                                                                d1i4gb2 B:121-233 Staphylococcal enterotoxin A, SEA                                                               SCOP domains
               CATH domains 1i4gB02 B:8-31,B:117-2321i4gB01 B:32-114  [code=2.40.50.110, no name defined]                              --1i4gB02 B:8-31,B:117-232  [code=3.10.20.120, no name defined]                                                       - CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ......hhhhhhhhhhhhhhhhhhh...eeeeeee........eeee...........eeeee..hhhhhhh....eeeeee.ee...........eeeee..eee....eeeeeee..eeeee..eee.......eeee.eeehhhhhhhhhhhhhhhhh...hhhhh....eeeeeee......eeee.......hhhhhhhhhh...eee....eeeeeee.. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------STAPH_STRE-----------------------------STAPH_STREP_TOXIN_2     --------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1i4g B   8 NEKDLRKKSELQGTALGNLKQIYYYNEKAKTENKESHDQFLQHTILFKGFFTDHSWYNDLLVDFDSKDIVDKYKGKKVDLYGAYYGYQCAGGTPNKTACMYGGVTLHDNNRLTEEKKVPINLWLDGKQNTVPLETVKTNKKNVTVQELDLQARRYLQEKYNLYNSDVFDGKVQRGLIVFATSTEPSVNYDLFGAQGQYSNTLLRIYRDNKTINSENMHIDIYLYTS 233
                                    17        27        37        47        57        67        77        87        97       107       117       127       137       147       157       167       177       187       197       207       217       227

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 '\|'

Asymmetric Unit

Classes(

)

Architectures( (-)

)

Topologies( (-)

)

Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Alpha Beta (26913)

Architecture: Roll (3276)

Topology: Ubiquitin-like (UB roll) (674)

Homologous Superfamily: [code=3.10.20.120, no name defined] (91)

Staphylococcus aureus. Organism_taxid: 1280. (14)

1a	1i4gA02	A:10-31,A:117-232
1b	1i4gB02	B:8-31,B:117-232

Class: Mainly Beta (13760)

Architecture: Beta Barrel (4804)

Topology: OB fold (Dihydrolipoamide Acetyltransferase, E2P) (1040)

Homologous Superfamily: [code=2.40.50.110, no name defined] (136)

Staphylococcus aureus. Organism_taxid: 1280. (14)

2a	1i4gA01	A:32-114
2b	1i4gB01	B:32-114

(no "Pfam Domain" information available for 1I4G)

Asymmetric Unit(hide GO term definitions)

Chain A,B (ETXA_STAAU | P0A0L2)

molecular function
	GO:0042289	MHC class II protein binding	Interacting selectively and non-covalently with major histocompatibility complex class II molecules; a set of molecules displayed on cell surfaces that are responsible for lymphocyte recognition and antigen presentation.
	GO:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
	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).
biological process
	GO:0009405	pathogenesis	The set of specific processes that generate the ability of an organism to induce an abnormal, generally detrimental state in another organism.
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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	ETXA_STAAU \| P0A0L2	:	1dyq 1esf 1i4h 1lo5 1sea 1sxt 5fk9

1efs	WILD-TYPE SEA BINDING CD2+
1i4h	SEA MUTANT H187A, HIGH ZN2+ CONTENT
1sxt	WILD-TYPE SEA BINDING ZN2+

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