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Title :   APOSTREPTAVIDIN PH 3.08 I222 COMPLEX

Authors :   B. A. Katz

Date :   13 Aug 97 (Deposition) - 16 Sep 98 (Release) - 08 Feb 17 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   1.57

Chains :   Asym. Unit : B,D
Biol. Unit 1: B,D  (2x)
Biol. Unit 2: B,D  (4x)

Keywords :   Biotin-Binding Protein, Apostreptavidin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   B. A. Katz
Binding Of Biotin To Streptavidin Stabilizes Intersubunit Salt Bridges Between Asp61 And His87 At Low Ph.
J. Mol. Biol. V. 274 776 1997
PubMed-ID: 9405158 | Reference-DOI: 10.1006/JMBI.1997.1444
(for further references see the PDB file header)

Molecule 1 - STREPTAVIDIN
	Chains	:	B, D
	Organism Scientific	:	STREPTOMYCES AVIDINII
	Organism Taxid	:	1895

		1	2
Asymmetric Unit	:	B	D
Biological Unit 1 (2x)	:	B	D
Biological Unit 2 (4x)	:	B	D

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (4, 6)

No.	Name	Count	Type	Full Name
1	CL	2	Ligand/Ion	CHLORIDE ION
2	FMT	2	Ligand/Ion	FORMIC ACID
3	NA	1	Ligand/Ion	SODIUM ION
4	NH4	1	Ligand/Ion	AMMONIUM ION

Biological Unit 1 (2, 6)

No.	Name	Count	Type	Full Name
1	CL	-1	Ligand/Ion	CHLORIDE ION
2	FMT	4	Ligand/Ion	FORMIC ACID
3	NA	-1	Ligand/Ion	SODIUM ION
4	NH4	2	Ligand/Ion	AMMONIUM ION

Biological Unit 2 (2, 12)

No.	Name	Count	Type	Full Name
1	CL	-1	Ligand/Ion	CHLORIDE ION
2	FMT	8	Ligand/Ion	FORMIC ACID
3	NA	-1	Ligand/Ion	SODIUM ION
4	NH4	4	Ligand/Ion	AMMONIUM ION

Asymmetric Unit (6, 6)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	SER B:27 , TYR B:43 , SER B:45	BINDING SITE FOR RESIDUE NA B 403
2	AC2	SOFTWARE	ASN B:23 , SER B:27 , TYR B:43 , SER B:45	BINDING SITE FOR RESIDUE CL B 1464
3	AC3	SOFTWARE	GLY B:48 , ALA B:86 , SER B:88 , HOH B:404 , HOH B:506	BINDING SITE FOR RESIDUE FMT B 405
4	AC4	SOFTWARE	ASP D:128 , CL D:1459	BINDING SITE FOR RESIDUE NH4 D 508
5	AC5	SOFTWARE	ASN D:23 , TYR D:43 , ASP D:128 , NH4 D:508	BINDING SITE FOR RESIDUE CL D 1459
6	AC6	SOFTWARE	GLY D:48 , ASN D:49 , HOH D:503	BINDING SITE FOR RESIDUE FMT D 401

(no "SS Bond" information available for 2IZE)

(no "Cis Peptide Bond" information available for 2IZE)

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

Asymmetric Unit (2, 4)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	AVIDIN_2	PS51326	Avidin-like domain profile.	SAV_STRAV	37-159	2	B:13-134 D:13-133
2	AVIDIN_1	PS00577	Avidin-like domain signature.	SAV_STRAV	142-156	2	B:118-132 D:118-132

Biological Unit 1 (2, 8)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	AVIDIN_2	PS51326	Avidin-like domain profile.	SAV_STRAV	37-159	4	B:13-134 D:13-133
2	AVIDIN_1	PS00577	Avidin-like domain signature.	SAV_STRAV	142-156	4	B:118-132 D:118-132

Biological Unit 2 (2, 16)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	AVIDIN_2	PS51326	Avidin-like domain profile.	SAV_STRAV	37-159	8	B:13-134 D:13-133
2	AVIDIN_1	PS00577	Avidin-like domain signature.	SAV_STRAV	142-156	8	B:118-132 D:118-132

(no "Exon" information available for 2IZE)

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 B from PDB  Type:PROTEIN  Length:122
 aligned with SAV_STRAV | P22629 from UniProtKB/Swiss-Prot  Length:183

    Alignment length:122
                                    46        56        66        76        86        96       106       116       126       136       146       156  
            SAV_STRAV    37 AEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVK 158
               SCOP domains d2izeb_ B: Streptavidin                                                                                                    SCOP domains
               CATH domains 2izeB00 B:13-134  [code=2.40.128.30, no name defined]                                                                      CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhh.eeeee....eeeeee....eeeeeee........eeeeeeee..........eeeeeeee.........eeeeeeeeee.....eeeeeeeeee...hhhhhh.eeeeeeeeeee. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) AVIDIN_2  PDB: B:13-134 UniProt: 37-159                                                                                    PROSITE (1)
                PROSITE (2) ---------------------------------------------------------------------------------------------------------AVIDIN_1       -- PROSITE (2)
                 Transcript -------------------------------------------------------------------------------------------------------------------------- Transcript
                 2ize B  13 AEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVK 134
                                    22        32        42        52        62        72        82        92       102       112       122       132

Chain D from PDB  Type:PROTEIN  Length:121
 aligned with SAV_STRAV | P22629 from UniProtKB/Swiss-Prot  Length:183

    Alignment length:121
                                    46        56        66        76        86        96       106       116       126       136       146       156 
            SAV_STRAV    37 AEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKV 157
               SCOP domains d2ized_ D: Streptavidin                                                                                                   SCOP domains
               CATH domains 2izeD00 D:13-133  [code=2.40.128.30, no name defined]                                                                     CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhh.eeee.....eeeeee....eeeeeee........eeeeeeee..........eeeeeeee.........eeeeeeeeee.....eeeeeeeeee...hhhhhh.eeeeeeeee.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) AVIDIN_2  PDB: D:13-133 UniProt: 37-159                                                                                   PROSITE (1)
                PROSITE (2) ---------------------------------------------------------------------------------------------------------AVIDIN_1       - PROSITE (2)
                 Transcript ------------------------------------------------------------------------------------------------------------------------- Transcript
                 2ize D  13 AEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKV 133
                                    22        32        42        52        62        72        82        92       102       112       122       132

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
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	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(

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Folds(

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Superfamilies( (-)

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Families(

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)

Class: All beta proteins (24004)

Fold: Streptavidin-like (225)

Superfamily: Avidin/streptavidin (197)

Family: Avidin/streptavidin (181)

Protein domain: Streptavidin (121)

Streptomyces avidinii [TaxId: 1895] (121)

1a	d2izeb_	B:
1b	d2ized_	D:

Asymmetric Unit

Classes(

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Architectures( (-)

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Topologies( (-)

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Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Mainly Beta (13760)

Architecture: Beta Barrel (4804)

Topology: Lipocalin (526)

Homologous Superfamily: [code=2.40.128.30, no name defined] (148)

Streptomyces avidinii. Organism_taxid: 1895 (38)

1a	2izeD00	D:13-133
1b	2izeB00	B:13-134

(no "Pfam Domain" information available for 2IZE)

Asymmetric Unit(hide GO term definitions)

Chain B,D (SAV_STRAV | P22629)

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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Description

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