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Asym./Biol. Unit (Jmol Viewer)

Asym./Biol. Unit - sites (Jmol Viewer)

Title :   LACTOSE BINDING TO HEAT-LABILE ENTEROTOXIN REVEALED BY X-RAY CRYSTALLOGRAPHY

Authors :   T. K. Sixma, W. G. J. Hol

Date :   15 Jul 92 (Deposition) - 31 Jan 94 (Release) - 08 Sep 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.30

Chains :   Asym./Biol. Unit : A,C,D,E,F,G,H

Keywords :   Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   T. K. Sixma, S. E. Pronk, K. H. Kalk, B. A. Van Zanten, A. M. Berghuis, W. G. Hol
Lactose Binding To Heat-Labile Enterotoxin Revealed By X-Ray Crystallography.
Nature V. 355 561 1992
PubMed-ID: 1741035 | Reference-DOI: 10.1038/355561A0
(for further references see the PDB file header)

Molecule 1 - HEAT-LABILE ENTEROTOXIN, SUBUNIT B
	Chains	:	D, E, F, G, H
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Taxid	:	562
	Organ	:	TAIL
	Organism Scientific	:	ESCHERICHIA COLI
	Organism Taxid	:	562

Molecule 2 - HEAT-LABILE ENTEROTOXIN, SUBUNIT A
	Chains	:	A
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Taxid	:	562
	Organ	:	TAIL
	Organism Scientific	:	ESCHERICHIA COLI
	Organism Taxid	:	562

Molecule 3 - HEAT-LABILE ENTEROTOXIN, SUBUNIT A
	Chains	:	C
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Taxid	:	562
	Organ	:	TAIL
	Organism Scientific	:	ESCHERICHIA COLI
	Organism Taxid	:	562

		1	2	3	4	5	6	7
Asymmetric/Biological Unit	:	A	C	D	E	F	G	H

Summary Information (see also Sequences/Alignments below)

Asymmetric/Biological Unit (2, 10)

No.	Name	Count	Type	Full Name
1	BGC	5	Ligand/Ion	BETA-D-GLUCOSE
2	GAL	5	Ligand/Ion	BETA-D-GALACTOSE

Asymmetric Unit (10, 10)

No.	Name	Evidence	Residues	Description
01	AC1	SOFTWARE	GLU D:51 , GLN D:56 , HIS D:57 , GLN D:61 , TRP D:88 , ASN D:90 , LYS D:91 , BGC D:105 , HOH D:147 , HOH E:110	BINDING SITE FOR RESIDUE GAL D 104
02	AC2	SOFTWARE	GLN D:56 , GAL D:104	BINDING SITE FOR RESIDUE BGC D 105
03	AC3	SOFTWARE	ASP A:170 , GLU E:51 , GLN E:56 , HIS E:57 , GLN E:61 , TRP E:88 , ASN E:90 , LYS E:91 , BGC E:105 , HOH E:152	BINDING SITE FOR RESIDUE GAL E 104
04	AC4	SOFTWARE	GLY C:196 , GLN E:56 , GAL E:104 , HOH E:132 , HOH E:153	BINDING SITE FOR RESIDUE BGC E 105
05	AC5	SOFTWARE	GLU F:51 , GLN F:56 , HIS F:57 , GLN F:61 , TRP F:88 , ASN F:90 , LYS F:91 , BGC F:105 , HOH F:119 , HOH G:120	BINDING SITE FOR RESIDUE GAL F 104
06	AC6	SOFTWARE	GLN F:56 , GAL F:104 , HOH F:119	BINDING SITE FOR RESIDUE BGC F 105
07	AC7	SOFTWARE	GLU G:51 , GLN G:56 , HIS G:57 , GLN G:61 , TRP G:88 , ASN G:90 , LYS G:91 , BGC G:105 , HOH G:126 , HOH G:133	BINDING SITE FOR RESIDUE GAL G 104
08	AC8	SOFTWARE	SER A:81 , HIS A:181 , GLN G:56 , GAL G:104 , HOH G:126 , HOH G:133	BINDING SITE FOR RESIDUE BGC G 105
09	AC9	SOFTWARE	HOH D:119 , GLU H:51 , GLN H:56 , HIS H:57 , GLN H:61 , TRP H:88 , ASN H:90 , LYS H:91 , BGC H:105	BINDING SITE FOR RESIDUE GAL H 104
10	BC1	SOFTWARE	GLN H:56 , GAL H:104 , HOH H:148	BINDING SITE FOR RESIDUE BGC H 105

Asymmetric/Biological Unit

No.	Residues
1	A:187	-	C:199
2	D:9	-	D:86
3	E:9	-	E:86
4	F:9	-	F:86
5	G:9	-	G:86
6	H:9	-	H:86

Asymmetric/Biological Unit

No.	Residues
1	Thr D:92	-	Pro D:93
2	Thr E:92	-	Pro E:93
3	Thr F:92	-	Pro F:93
4	Thr G:92	-	Pro G:93
5	Thr H:92	-	Pro H:93
6	Glu A:177	-	Pro A:178

Asymmetric/Biological Unit (2, 6)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_ELBP_ECOLX_001 *	T	96	A	ELBP_ECOLX	---	---	D/E/F/G/H	T	75	A
2	UniProt	VAR_ELAP_ECOLX_001 *	E	130	K	ELAP_ECOLX	---	---	A	E	112	K
	* ID not provided by source

SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

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

(no "Exon" information available for 1LTT)

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:185
 aligned with ELAP_ECOLX | P06717 from UniProtKB/Swiss-Prot  Length:258

    Alignment length:185
                                    31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201     
           ELAP_ECOLX    22 RLYRADSRPPDEIKRSGGLMPRGHNEYFDRGTQMNINLYDHARGTQTGFVRYDDGYVSTSLSLRSAHLAGQSILSGYSTYYIYVIATAPNMFNVNDVLGVYSPHPYEQEVSALGGIPYSQIYGWYRVNFGVIDERLHRNREYRDRYYRNLNIAPAEDGYRLAGFPPDHQAWREEPWIHHAPQGCG 206
               SCOP domains d1ltt.1 A:,C: Heat-labile toxin, A-chain                                                                                                                                                  SCOP domains
               CATH domains 1lttA00 A:4-188 Heat-Labile Enterotoxin, subunit A                                                                                                                                        CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author eeeeee...hhhhhhh.....................hhhhhh............eeeee..hhhhhhhhhhhh....eeeeeeee....eeehhhhhhhh...hhh.eeeee....hhheeeeeeee..eeeeeeee.....hhhh.......hhh.hhh.......hhhh...hhhh...... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------K---------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1ltt A   4 RLYRADSRPPDEIKRSGGLMPRGHNEYFDRGTQMNINLYDHARGTQTGFVRYDDGYVSTSLSLRSAHLAGQSILSGYSTYYIYVIATAPNMFNVNDVLGVYSPHPYEQEVSALGGIPYSQIYGWYRVNFGVIDERLHRNREYRDRYYRNLNIAPAEDGYRLAGFPPDHQAWREEPWIHHAPQGCG 188
                                    13        23        33        43        53        63        73        83        93       103       113       123       133       143       153       163       173       183

Chain C from PDB  Type:PROTEIN  Length:41
 aligned with ELAP_ECOLX | P06717 from UniProtKB/Swiss-Prot  Length:258

    Alignment length:41
                                   223       233       243       253 
           ELAP_ECOLX   214 GDTCNEETQNLSTIYLREYQSKVKRQIFSDYQSEVDIYNRI 254
               SCOP domains d1ltt.1 A:,C: Heat-labile toxin, A-chain  SCOP domains
               CATH domains 1lttC00 C:196-236                         CATH domains
           Pfam domains (1) Enterotoxin_a-1lttC01 C:196-236           Pfam domains (1)
           Pfam domains (2) Enterotoxin_a-1lttC02 C:196-236           Pfam domains (2)
         Sec.struct. author .hhhhhhhhhhhhhhhhhhhhhhhhhh.hhh.....hhhh. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------- PROSITE
                 Transcript ----------------------------------------- Transcript
                 1ltt C 196 GDTCNEETQNLSTIYLREYQSKVKRQIFSDYQSEVDIYNRI 236
                                   205       215       225       235

Chain D from PDB  Type:PROTEIN  Length:103
 aligned with ELBP_ECOLX | P32890 from UniProtKB/Swiss-Prot  Length:124

    Alignment length:103
                                    31        41        51        61        71        81        91       101       111       121   
           ELBP_ECOLX    22 APQTITELCSEYRNTQIYTINDKILSYTESMAGKREMVIITFKSGETFQVEVPGSQHIDSQKKAIERMKDTLRITYLTETKIDKLCVWNNKTPNSIAAISMKN 124
               SCOP domains d1lttd_ D: Heat-labile toxin                                                                            SCOP domains
               CATH domains 1lttD00 D:1-103  [code=2.40.50.110, no name defined]                                                    CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....hhhhh.....eeeeeeee...eeeee......eeeee.....eeee........hhhhhhhhhhhhhhhhhhh....eeeeeee.....eeeeeeeee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------A---------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------- Transcript
                 1ltt D   1 APQTITELCSEYRNTQIYTINDKILSYTESMAGKREMVIITFKSGETFQVEVPGSQHIDSQKKAIERMKDTLRITYLTETKIDKLCVWNNKTPNSIAAISMKN 103
                                    10        20        30        40        50        60        70        80        90       100

Chain E from PDB  Type:PROTEIN  Length:103
 aligned with ELBP_ECOLX | P32890 from UniProtKB/Swiss-Prot  Length:124

    Alignment length:103
                                    31        41        51        61        71        81        91       101       111       121   
           ELBP_ECOLX    22 APQTITELCSEYRNTQIYTINDKILSYTESMAGKREMVIITFKSGETFQVEVPGSQHIDSQKKAIERMKDTLRITYLTETKIDKLCVWNNKTPNSIAAISMKN 124
               SCOP domains d1ltte_ E: Heat-labile toxin                                                                            SCOP domains
               CATH domains 1lttE00 E:1-103  [code=2.40.50.110, no name defined]                                                    CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....hhhhhh....eeeeeeee...eeeee......eeeee.....eeee..........hhhhhhhhhhhhhhhhhh...eeeeeee.....eeeeeeeee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------A---------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------- Transcript
                 1ltt E   1 APQTITELCSEYRNTQIYTINDKILSYTESMAGKREMVIITFKSGETFQVEVPGSQHIDSQKKAIERMKDTLRITYLTETKIDKLCVWNNKTPNSIAAISMKN 103
                                    10        20        30        40        50        60        70        80        90       100

Chain F from PDB  Type:PROTEIN  Length:103
 aligned with ELBP_ECOLX | P32890 from UniProtKB/Swiss-Prot  Length:124

    Alignment length:103
                                    31        41        51        61        71        81        91       101       111       121   
           ELBP_ECOLX    22 APQTITELCSEYRNTQIYTINDKILSYTESMAGKREMVIITFKSGETFQVEVPGSQHIDSQKKAIERMKDTLRITYLTETKIDKLCVWNNKTPNSIAAISMKN 124
               SCOP domains d1lttf_ F: Heat-labile toxin                                                                            SCOP domains
               CATH domains 1lttF00 F:1-103  [code=2.40.50.110, no name defined]                                                    CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....hhhhhh....eeeeeeee...eeeee.......eeee.....eeee........hhhhhhhhhhhhhhhhhhhh...eeeeeee.....eeeeeeeee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------A---------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------- Transcript
                 1ltt F   1 APQTITELCSEYRNTQIYTINDKILSYTESMAGKREMVIITFKSGETFQVEVPGSQHIDSQKKAIERMKDTLRITYLTETKIDKLCVWNNKTPNSIAAISMKN 103
                                    10        20        30        40        50        60        70        80        90       100

Chain G from PDB  Type:PROTEIN  Length:103
 aligned with ELBP_ECOLX | P32890 from UniProtKB/Swiss-Prot  Length:124

    Alignment length:103
                                    31        41        51        61        71        81        91       101       111       121   
           ELBP_ECOLX    22 APQTITELCSEYRNTQIYTINDKILSYTESMAGKREMVIITFKSGETFQVEVPGSQHIDSQKKAIERMKDTLRITYLTETKIDKLCVWNNKTPNSIAAISMKN 124
               SCOP domains d1lttg_ G: Heat-labile toxin                                                                            SCOP domains
               CATH domains 1lttG00 G:1-103  [code=2.40.50.110, no name defined]                                                    CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....hhhhh.....eeeeeeee...eeeeeee..eeeeeee.....eeee........hhhhhhhhhhhhhhhhhhh...eeeeeeee.....eeeeeeeee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------A---------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------- Transcript
                 1ltt G   1 APQTITELCSEYRNTQIYTINDKILSYTESMAGKREMVIITFKSGETFQVEVPGSQHIDSQKKAIERMKDTLRITYLTETKIDKLCVWNNKTPNSIAAISMKN 103
                                    10        20        30        40        50        60        70        80        90       100

Chain H from PDB  Type:PROTEIN  Length:103
 aligned with ELBP_ECOLX | P32890 from UniProtKB/Swiss-Prot  Length:124

    Alignment length:103
                                    31        41        51        61        71        81        91       101       111       121   
           ELBP_ECOLX    22 APQTITELCSEYRNTQIYTINDKILSYTESMAGKREMVIITFKSGETFQVEVPGSQHIDSQKKAIERMKDTLRITYLTETKIDKLCVWNNKTPNSIAAISMKN 124
               SCOP domains d1ltth_ H: Heat-labile toxin                                                                            SCOP domains
               CATH domains 1lttH00 H:1-103  [code=2.40.50.110, no name defined]                                                    CATH domains
           Pfam domains (1) Enterotoxin_b-1lttH01 H:1-102                                                                         - Pfam domains (1)
           Pfam domains (2) Enterotoxin_b-1lttH02 H:1-102                                                                         - Pfam domains (2)
           Pfam domains (3) Enterotoxin_b-1lttH03 H:1-102                                                                         - Pfam domains (3)
           Pfam domains (4) Enterotoxin_b-1lttH04 H:1-102                                                                         - Pfam domains (4)
           Pfam domains (5) Enterotoxin_b-1lttH05 H:1-102                                                                         - Pfam domains (5)
         Sec.struct. author ....hhhhh.....eeeeeeee...eeeee.......eeee.....eeee..........hhhhhhhhhhhhhhhhhh...eeeeeee.....eeeeeeeee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------A---------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------- Transcript
                 1ltt H   1 APQTITELCSEYRNTQIYTINDKILSYTESMAGKREMVIITFKSGETFQVEVPGSQHIDSQKKAIERMKDTLRITYLTETKIDKLCVWNNKTPNSIAAISMKN 103
                                    10        20        30        40        50        60        70        80        90       100

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/Biological Unit

Classes(

)

Folds(

)

Superfamilies( (-)

)

Families(

)

Protein Domains( (-)

)

Organisms( (-)

)

Class: All beta proteins (24004)

Fold: OB-fold (1179)

Superfamily: Bacterial enterotoxins (188)

Family: Bacterial AB5 toxins, B-subunits (85)

Protein domain: Heat-labile toxin (24)

Escherichia coli, type IB [TaxId: 562] (21)

1a	d1lttd_	D:
1b	d1ltte_	E:
1c	d1lttf_	F:
1d	d1lttg_	G:
1e	d1ltth_	H:

Class: Alpha and beta proteins (a+b) (23004)

Fold: ADP-ribosylation (157)

Superfamily: ADP-ribosylation (157)

Family: ADP-ribosylating toxins (85)

Protein domain: Heat-labile toxin, A-chain (10)

Escherichia coli, type IB [TaxId: 562] (9)

d1ltt.1

A:,C:

Asymmetric/Biological Unit

Clans(

)

Families(

)

Organisms( (-)

)

Clan: ADP-ribosyl (56)

Family: Enterotoxin_a (14)

Escherichia coli (8)

1a	Enterotoxin_a-1lttC01	C:196-236
1b	Enterotoxin_a-1lttC02	C:196-236

Clan: no clan defined [family: Enterotoxin_b] (23)

Family: Enterotoxin_b (23)

Escherichia coli (12)

2a	Enterotoxin_b-1lttH01	H:1-102
2b	Enterotoxin_b-1lttH02	H:1-102
2c	Enterotoxin_b-1lttH03	H:1-102
2d	Enterotoxin_b-1lttH04	H:1-102
2e	Enterotoxin_b-1lttH05	H:1-102

Asymmetric/Biological Unit(hide GO term definitions)

Chain A,C (ELAP_ECOLX | P06717)

molecular function
	GO:0003824	catalytic activity	Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
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.

Chain D,E,F,G,H (ELBP_ECOLX | P32890)

biological process
	GO:0031640	killing of cells of other organism	Any process in an organism that results in the killing of cells of another organism, including in some cases the death of the other organism. Killing here refers to the induction of death in one cell by another cell, not cell-autonomous death due to internal or other environmental conditions.
	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.

Asymmetric/Biological Unit
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	Cis Peptide Bonds
		Glu A:177 - Pro A:178	[ RasMol ]
		Thr D:92 - Pro D:93	[ RasMol ]
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	1ltt
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(no "Related Entries Specified in the PDB File" available for 1LTT)

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (2, 10)

Sites (10, 10)

SS Bonds (6, 6)

Cis Peptide Bonds (6, 6)

Sequence-Structure Mapping

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