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Asym./Biol. Unit (Jmol Viewer)

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

Title :   MUTANT (D193G) MALTOTETRAOSE-FORMING EXO-AMYLASE IN COMPLEX WITH MALTOTETRAOSE

Authors :   Y. Yoshioka, K. Hasegawa, Y. Matsuura, Y. Katsube, M. Kubota

Date :   26 May 99 (Deposition) - 17 Nov 99 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.00

Chains :   Asym./Biol. Unit : A

Keywords :   Beta-Alpha-Barrels, Hydrolase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   K. Hasegawa, M. Kubota, Y. Matsuura
Roles Of Catalytic Residues In Alpha-Amylases As Evidenced By The Structures Of The Product-Complexed Mutants Of A Maltotetraose-Forming Amylase.
Protein Eng. V. 12 819 1999
PubMed-ID: 10556241 | Reference-DOI: 10.1093/PROTEIN/12.10.819
(for further references see the PDB file header)

Molecule 1 - PROTEIN (MALTOTETRAOSE-FORMING AMYLASE)
	Chains	:	A
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Taxid	:	562
	Expression System Vector	:	PUC18
	Mutation	:	YES
	Organism Scientific	:	PSEUDOMONAS STUTZERI
	Organism Taxid	:	316

		1
Asymmetric/Biological Unit	:	A

Summary Information (see also Sequences/Alignments below)

Asymmetric/Biological Unit (2, 3)

No.	Name	Count	Type	Full Name
1	CA	2	Ligand/Ion	CALCIUM ION
2	MTT	1	Ligand/Ion	MALTOTETRAOSE

Asymmetric Unit (3, 3)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	ASN A:116 , ASP A:151 , ASP A:154 , ASP A:162 , GLY A:197 , HOH A:553	BINDING SITE FOR RESIDUE CA A 451
2	AC2	SOFTWARE	ASP A:1 , GLN A:2 , HIS A:13 , ASP A:16 , GLU A:17	BINDING SITE FOR RESIDUE CA A 452
3	AC3	SOFTWARE	TRP A:25 , TRP A:66 , TYR A:78 , PHE A:79 , HIS A:117 , PHE A:156 , ILE A:157 , GLY A:158 , ASP A:160 , ARG A:191 , GLY A:193 , PHE A:194 , GLU A:219 , HIS A:293 , ASP A:294 , GLN A:305 , HOH A:515 , HOH A:665 , HOH A:666 , HOH A:718 , HOH A:730	BINDING SITE FOR RESIDUE MTT A 460

Asymmetric/Biological Unit

No.	Residues
1	A:140	-	A:150
2	A:216	-	A:251

(no "Cis Peptide Bond" information available for 1QPK)

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

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

(no "Exon" information available for 1QPK)

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
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Chain A from PDB  Type:PROTEIN  Length:418
 aligned with AMT4_PSEST | P13507 from UniProtKB/Swiss-Prot  Length:548

    Alignment length:418
                                    31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341       351       361       371       381       391       401       411       421       431        
           AMT4_PSEST    22 DQAGKSPNAVRYHGGDEIILQGFHWNVVREAPNDWYNILRQQAATIAADGFSAIWMPVPWRDFSSWSDGSKSGGGEGYFWHDFNKNGRYGSDAQLRQAASALGGAGVKVLYDVVPNHMNRGYPDKEINLPAGQGFWRNDCADPGNYPNDCDDGDRFIGGDADLNTGHPQVYGMFRDEFTNLRSQYGAGGFRFDFVRGYAPERVNSWMTDSADNSFCVGELWKGPSEYPNWDWRNTASWQQIIKDWSDRAKCPVFDFALKERMQNGSIADWKHGLNGNPDPRWREVAVTFVDNHDTGYSPGQNGGQHHWALQDGLIRQAYAYILTSPGTPVVYWSHMYDWGYGDFIRQLIQVRRAAGVRADSAISFHSGYSGLVATVSGSQQTLVVALNSDLGNPGQVASGSFSEAVNASNGQVRVWRS 439
               SCOP domains d1qpka2 A:1-357 G4-amylase (1,4-alpha-D-glucan maltotetrahydrolase)                                                                                                                                                                                                                                                                                                  d1qpka1 A:358-418                                             SCOP domains
               CATH domains 1qpkA01 A:1-360 Glycosidases                                                                                                                                                                                                                                                                                                                                            -1qpkA02 A:362-417 Golgi alpha-mannosidase II            - CATH domains
               Pfam domains --------------------------------------Alpha-amylase-1qpkA01 A:39-335                                                                                                                                                                                                                                                                           -------------------------------DUF1921-1qpkA02 A:367-417                          - Pfam domains
         Sec.struct. author ...........hhhhh..eee....hhhhhh..hhhhhhhhhhhhhhhhh..eeee.........eee..eee.................hhhhhhhhhhhhhhh..eeeeee.......................hhhh..........................hhhhhhhhhhhhhhhhhhh.eeeeee.hhhhhhhhhhhhhhhhhh...eeee....hhhhh...hhhhhhhhhhhhhhhhhhhh..eehhhhhhhhhhhhhhhhhhhhhhh.hhhhhh.eee...........hhhhh......hhhhhhhhhhhhhhh..eeeeehhhhhh..hhhhhhhhhhhhhhhh.....eeeee.....eeeeee....eeeeee.....hhhhh.....eeeeeehhh.eeeee. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1qpk A   1 DQAGKSPNAVRYHGGDEIILQGFHWNVVREAPNDWYNILRQQAATIAADGFSAIWMPVPWRDFSSWSDGSKSGGGEGYFWHDFNKNGRYGSDAQLRQAASALGGAGVKVLYDVVPNHMNRGYPDKEINLPAGQGFWRNDCADPGNYPNDCDDGDRFIGGDADLNTGHPQVYGMFRDEFTNLRSQYGAGGFRFGFVRGYAPERVNSWMTDSADNSFCVGELWKGPSEYPNWDWRNTASWQQIIKDWSDRAKCPVFDFALKERMQNGSIADWKHGLNGNPDPRWREVAVTFVDNHDTGYSPGQNGGQHHWALQDGLIRQAYAYILTSPGTPVVYWDHMYDWGYGDFIRQLIQVRRAAGVRADSAISFHSGYSGLVATVSGSQQTLVVALNSDLGNPGQVASGSFSEAVNASNGQVRVWRS 418
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410

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(

)

Architectures( (-)

)

Topologies( (-)

)

Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Alpha Beta (26913)

Architecture: Alpha-Beta Barrel (2994)

Topology: TIM Barrel (2806)

Homologous Superfamily: Glycosidases (843)

Pseudomonas stutzeri. Organism_taxid: 316. (1)

1qpkA01

A:1-360

Class: Mainly Beta (13760)

Architecture: Sandwich (5577)

Topology: Immunoglobulin-like (3897)

Homologous Superfamily: Golgi alpha-mannosidase II (346)

Pseudomonas stutzeri. Organism_taxid: 316. (1)

1qpkA02

A:362-417

Asymmetric/Biological Unit(hide GO term definitions)

Chain A (AMT4_PSEST | P13507)

molecular function
	GO:0030246	carbohydrate binding	Interacting selectively and non-covalently with any carbohydrate, which includes monosaccharides, oligosaccharides and polysaccharides as well as substances derived from monosaccharides by reduction of the carbonyl group (alditols), by oxidation of one or more hydroxy groups to afford the corresponding aldehydes, ketones, or carboxylic acids, or by replacement of one or more hydroxy group(s) by a hydrogen atom. Cyclitols are generally not regarded as carbohydrates.
	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.
	GO:0043169	cation binding	Interacting selectively and non-covalently with cations, charged atoms or groups of atoms with a net positive charge.
	GO:0033910	glucan 1,4-alpha-maltotetraohydrolase activity	Catalysis of the hydrolysis of (1->4)-alpha-D-glucosidic linkages in amylaceous polysaccharides, to remove successive maltotetraose residues from the non-reducing chain ends.
	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:0016798	hydrolase activity, acting on glycosyl bonds	Catalysis of the hydrolysis of any glycosyl bond.
	GO:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
	GO:2001070	starch binding	Interacting selectively and non-covalently with starch.
biological process
	GO:0005975	carbohydrate metabolic process	The chemical reactions and pathways involving carbohydrates, any of a group of organic compounds based of the general formula Cx(H2O)y. Includes the formation of carbohydrate derivatives by the addition of a carbohydrate residue to another molecule.
	GO:0008152	metabolic process	The chemical reactions and pathways, including anabolism and catabolism, by which living organisms transform chemical substances. Metabolic processes typically transform small molecules, but also include macromolecular processes such as DNA repair and replication, and protein synthesis and degradation.
	GO:0005983	starch catabolic process	The chemical reactions and pathways resulting in the breakdown of starch, the most important reserve polysaccharide in plants.
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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	1qpk
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UniProtKB/Swiss-Prot
	AMT4_PSEST \| P13507	:	1gcy 1jda 1jdc 1jdd 1qi3 1qi4 1qi5 2amg

1jda	MUTANT (E219Q) MALTOTETRAOSE-FORMING EXO-AMYLASE
1jdc	MUTANT (E219Q) MALTOTETRAOSE-FORMING EXO-AMYLASE IN COMPLEX WITH MALTOTETRAOSE (CRYSTAL TYPE 1)
1jdd	MUTANT (E219Q) MALTOTETRAOSE-FORMING EXO-AMYLASE IN COMPLEX WITH MALTOTETRAOSE (CRYSTAL TYPE 2)
1qi3	MUTANT (D193N) MALTOTETRAOSE-FORMING EXO-AMYLASE IN COMPLEX WITH MALTOTETRAOSE
1qi4	MUTANT (E219G) MALTOTETRAOSE-FORMING EXO-AMYLASE IN COMPLEX WITH MALTOTETRAOSE
1qi5	MUTANT (D294N) MALTOTETRAOSE-FORMING EXO-AMYLASE IN COMPLEX WITH MALTOTETRAOSE
2amg	MALTOTETRAOSE-FORMING EXO-AMYLASE

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