3L4Z - JenaLib

Asym./Biol. Unit (Jmol Viewer)

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

Title :   CRYSTAL COMPLEX OF N-TERMINAL HUMAN MALTASE-GLUCOAMYLASE WITH SALACINOL

Authors :   L. Sim, D. R. Rose

Date :   21 Dec 09 (Deposition) - 09 Feb 10 (Release) - 09 Feb 10 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.00

Chains :   Asym./Biol. Unit : A

Keywords :   Glycoside Hydrolase Family 31, Cell Membrane, Disulfide Bond, Glycoprotein, Glycosidase, Hydrolase, Membrane, Multifunctional Enzyme, Polymorphism, Signal-Anchor, Sulfation, Transmembrane (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   L. Sim, K. Jayakanthan, S. Mohan, R. Nasi, B. D. Johnston, B. M. Pinto, D. R. Rose
New Glucosidase Inhibitors From An Ayurvedic Herbal Treatment For Type 2 Diabetes: Structures And Inhibition Of Human Intestinal Maltase-Glucoamylase With Compounds From Salacia Reticulata.
Biochemistry V. 49 443 2010
PubMed-ID: 20039683 | Reference-DOI: 10.1021/BI9016457

Molecule 1 - MALTASE-GLUCOAMYLASE, INTESTINAL
	Chains	:	A
	EC Number	:	3.2.1.20, 3.2.1.3
	Engineered	:	YES
	Expression System	:	DROSOPHILA MELANOGASTER
	Expression System Plasmid	:	PMT-BIP-V5-HIS
	Expression System Strain	:	S2 CELLS
	Expression System Taxid	:	7227
	Expression System Vector Type	:	STABLE TRANSFECTION PLASMID
	Fragment	:	UNP RESIDUES 87-954
	Gene	:	MGA, MGAM, MGAML
	Organism Common	:	HUMAN
	Organism Scientific	:	HOMO SAPIENS
	Organism Taxid	:	9606
	Synonym	:	MALTASE, ALPHA-GLUCOSIDASE, GLUCOAMYLASE, GLUCAN 1,4-ALPHA-GLUCOSIDASE

		1
Asymmetric/Biological Unit	:	A

Summary Information (see also Sequences/Alignments below)

Asymmetric/Biological Unit (3, 10)

No.	Name	Count	Type	Full Name
1	GOL	4	Ligand/Ion	GLYCEROL
2	NAG	5	Ligand/Ion	N-ACETYL-D-GLUCOSAMINE
3	SSD	1	Ligand/Ion	1,4-DIDEOXY-1,4-[[2R,3R)-2,4-DIHYDROXY-3-(SULFOXY)BUTYL]EPISULFONIUMYLIDENE]-D-ARABINITOL INNER SALT

Asymmetric Unit (10, 10)

No.	Name	Evidence	Residues	Description
01	AC1	SOFTWARE	ASP A:203 , TYR A:299 , ASP A:327 , ILE A:328 , ILE A:364 , TRP A:406 , TRP A:441 , ASP A:443 , ARG A:526 , TRP A:539 , ASP A:542 , PHE A:575 , HIS A:600 , GOL A:3002 , HOH A:4060 , HOH A:4185 , HOH A:4186 , HOH A:4233	BINDING SITE FOR RESIDUE SSD A 1001
02	AC2	SOFTWARE	ARG A:145 , SER A:146 , ASN A:147 , ASN A:741 , ALA A:746 , ASN A:750 , NAG A:2002 , HOH A:4081	BINDING SITE FOR RESIDUE NAG A 2001
03	AC3	SOFTWARE	ASN A:147 , ARG A:149 , NAG A:2001	BINDING SITE FOR RESIDUE NAG A 2002
04	AC4	SOFTWARE	LYS A:389 , ASN A:393 , GLY A:397 , VAL A:398 , VAL A:487 , GLN A:488 , HIS A:489 , NAG A:2004	BINDING SITE FOR RESIDUE NAG A 2003
05	AC5	SOFTWARE	LYS A:389 , NAG A:2003	BINDING SITE FOR RESIDUE NAG A 2004
06	AC6	SOFTWARE	GLY A:208 , ASN A:209	BINDING SITE FOR RESIDUE NAG A 2005
07	AC7	SOFTWARE	ALA A:285 , PRO A:287 , PHE A:522 , ILE A:523 , PHE A:535 , ALA A:536 , ALA A:537 , HOH A:4047 , HOH A:4249	BINDING SITE FOR RESIDUE GOL A 3001
08	AC8	SOFTWARE	PHE A:450 , SSD A:1001	BINDING SITE FOR RESIDUE GOL A 3002
09	AC9	SOFTWARE	HIS A:645 , VAL A:779 , ALA A:780	BINDING SITE FOR RESIDUE GOL A 3003
10	BC1	SOFTWARE	HIS A:625 , ASN A:628 , HOH A:4272	BINDING SITE FOR RESIDUE GOL A 3004

Asymmetric/Biological Unit

No.	Residues
1	A:15	-	A:31
2	A:573	-	A:584

Asymmetric/Biological Unit

No.	Residues
1	Gln A:136	-	Pro A:137
2	Gly A:181	-	Glu A:182
3	Ala A:248	-	Pro A:249
4	Glu A:446	-	Val A:447
5	Pro A:835	-	Ser A:836

Asymmetric/Biological Unit (3, 3)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_047350	Q	404	H	MGA_HUMAN	Polymorphism	2272330	A	Q	318	H
2	UniProt	VAR_047351	S	542	L	MGA_HUMAN	Polymorphism	10266732	A	S	456	L
3	UniProt	VAR_047352	N	858	D	MGA_HUMAN	Polymorphism	2960746	A	D	772	D

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

Asymmetric/Biological Unit (4, 4)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	P_TREFOIL_2	PS51448	P-type 'Trefoil' domain profile.	MGA_HUMAN	88-134 954-1000	1	- A:868-868
2	P_TREFOIL_1	PS00025	P-type 'Trefoil' domain signature.	MGA_HUMAN	98-119	1	A:12-33
3	GLYCOSYL_HYDROL_F31_1	PS00129	Glycosyl hydrolases family 31 active site.	MGA_HUMAN	525-532 1416-1423	1	A:439-446 -
4	GLYCOSYL_HYDROL_F31_2	PS00707	Glycosyl hydrolases family 31 signature 2.	MGA_HUMAN	655-685	1	A:569-599

(no "Exon" information available for 3L4Z)

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:863
 aligned with MGA_HUMAN | O43451 from UniProtKB/Swiss-Prot  Length:1857

    Alignment length:864
                                   102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372       382       392       402       412       422       432       442       452       462       472       482       492       502       512       522       532       542       552       562       572       582       592       602       612       622       632       642       652       662       672       682       692       702       712       722       732       742       752       762       772       782       792       802       812       822       832       842       852       862       872       882       892       902       912       922       932       942       952    
            MGA_HUMAN    93 VNELERINCIPDQPPTKATCDQRGCCWNPQGAVSVPWCYYSKNHSYHVEGNLVNTNAGFTARLKNLPSSPVFGSNVDNVLLTAEYQTSNRFHFKLTDQTNNRFEVPHEHVQSFSGNAAASLTYQVEISRQPFSIKVTRRSNNRVLFDSSIGPLLFADQFLQLSTRLPSTNVYGLGEHVHQQYRHDMNWKTWPIFNRDTTPNGNGTNLYGAQTFFLCLEDASGLSFGVFLMNSNAMEVVLQPAPAITYRTIGGILDFYVFLGNTPEQVVQEYLELIGRPALPSYWALGFHLSRYEYGTLDNMREVVERNRAAQLPYDVQHADIDYMDERRDFTYDSVDFKGFPEFVNELHNNGQKLVIIVDPAISNNSSSSKPYGPYDRGSDMKIWVNSSDGVTPLIGEVWPGQTVFPDYTNPNCAVWWTKEFELFHNQVEFDGIWIDMNEVSNFVDGSVSGCSTNNLNNPPFTPRILDGYLFCKTLCMDAVQHWGKQYDIHNLYGYSMAVATAEAAKTVFPNKRSFILTRSTFAGSGKFAAHWLGDNTATWDDLRWSIPGVLEFNLFGIPMVGPDICGFALDTPEELCRRWMQLGAFYPFSRNHNGQGYKDQDPASFGADSLLLNSSRHYLNIRYTLLPYLYTLFFRAHSRGDTVARPLLHEFYEDNSTWDVHQQFLWGPGLLITPVLDEGAEKVMAYVPDAVWYDYETGSQVRWRKQKVEMELPGDKIGLHLRGGYIFPTQQPNTTTLASRKNPLGLIIALDENKEAKGELFWDNGETKDTVANKVYLLCEFSVTQNRLEVNISQSTYKDPNNLAFNEIKILGTEEPSNVTVKHNGVPSQTSPTVTYDSNLKVAIITDIDLLLGEAYTVEWSI 956
               SCOP domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ CATH domains
               Pfam domains Trefoil-3l4zA02 A:7-47                   -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Glyco_hydro_31-3l4zA01 A:263-735                                                                                                                                                                                                                                                                                                                                                                                                                                                         --------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhh.........hhhhhhhh..ee..........ee......eeeeeeeee...eeeeeeee............eeeeeeeeee..eeeeeeee.........................eeeeee....eeeeee.....eeee.hhh..eee..eeeeeee.....eeeee.............eeeee.................eeeeeee......eeeeee.....eeeeee...eeeeee....eeeeeeee.hhhhhhhhhhhhhh.....hhhhh.eee......hhhhhhhhhhhhhhh.....eeeehhhhh..............hhhhhhhhhhhh..eeeeee...ee........hhhhhhhhhhh.............eee..eeee.....hhhhhhhhhhhhhhhhhhh...eeee.............................hhhhh..........ee..eehhhhh.hhhhhhhhhhhhhhhhhh......eee.....hhhhh.eee......hhhhhhhhhhhhhhhhhh....ee.ee.......hhhhhhhhhhhhh....eee.........hhhhhh..hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....eehhhhhhh.hhhhh.....eee...eeee........eeeeee....eee...........eeeeee......eeeee..eeeeee....hhhhhh...eeeeee.....eeeeeeee..............eeeeeeee..eeeeeeeee........eeeeeeee.....eeeeeee..ee.-...eeeee....eeeee...ee....eeeeee. Sec.struct. author
                 SAPs(SNPs) -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------H-----------------------------------------------------------------------------------------------------------------------------------------L---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------D-------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) P_TREFOIL_2  PDB: - UniProt: 88-134       ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------GLYCOSYL--------------------------------------------------------------------------------------------------------------------------GLYCOSYL_HYDROL_F31_2          ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------P_T PROSITE (1)
                PROSITE (2) -----P_TREFOIL_1           --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE (2)
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 3l4z A   7 VNELERINCIPDQPPTKATCDQRGCCWNPQGAVSVPWCYYSKNHSYHVEGNLVNTNAGFTARLKNLPSSPVFGSNVDNVLLTAEYQTSNRFHFKLTDQTNNRFEVPHEHVQSFSGNAAASLTYQVEISRQPFSIKVTRRSNNRVLFDSSIGPLLFADQFLQLSTRLPSTNVYGLGEHVHQQYRHDMNWKTWPIFNRDTTPNGNGTNLYGAQTFFLCLEDASGLSFGVFLMNSNAMEVVLQPAPAITYRTIGGILDFYVFLGNTPEQVVQEYLELIGRPALPSYWALGFHLSRYEYGTLDNMREVVERNRAAQLPYDVQHADIDYMDERRDFTYDSVDFKGFPEFVNELHNNGQKLVIIVDPAISNNSSSSKPYGPYDRGSDMKIWVNSSDGVTPLIGEVWPGQTVFPDYTNPNCAVWWTKEFELFHNQVEFDGIWIDMNEVSNFVDGSVSGCSTNNLNNPPFTPRILDGYLFCKTLCMDAVQHWGKQYDIHNLYGYSMAVATAEAAKTVFPNKRSFILTRSTFAGSGKFAAHWLGDNTATWDDLRWSIPGVLEFNLFGIPMVGPDICGFALDTPEELCRRWMQLGAFYPFSRNHNGQGYKDQDPASFGADSLLLNSSRHYLNIRYTLLPYLYTLFFRAHSRGDTVARPLLHEFYEDNSTWDVHQQFLWGPGLLITPVLDEGAEKVMAYVPDAVWYDYETGSQVRWRKQKVEMELPGDKIGLHLRGGYIFPTQQPNTTTLASRKNPLGLIIALDENKEAKGELFWDDGETKDTVANKVYLLCEFSVTQNRLEVNISQSTYKDPNNLAFNEIKILGTEEPSNVTVKHNGVPS-TSPTVTYDSNLKVAIITDIDLLLGEAYTVEWAH 870
                                    16        26        36        46        56        66        76        86        96       106       116       126       136       146       156       166       176       186       196       206       216       226       236       246       256       266       276       286       296       306       316       326       336       346       356       366       376       386       396       406       416       426       436       446       456       466       476       486       496       506       516       526       536       546       556       566       576       586       596       606       616       626       636       646       656       666       676       686       696       706       716       726       736       746       756       766       776       786       796       806       816       826       836 |     846       856       866    
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       836 |                                
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         838

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 '\|'

(no "SCOP Domain" information available for 3L4Z)

(no "CATH Domain" information available for 3L4Z)

Asymmetric/Biological Unit

Clans(

)

Families(

)

Organisms( (-)

)

Clan: Glyco_hydro_tim (488)

Family: Glyco_hydro_31 (25)

Homo sapiens (Human) (11)

Glyco_hydro_31-3l4zA01

A:263-735

Clan: no clan defined [family: Trefoil] (14)

Family: Trefoil (14)

Homo sapiens (Human) (12)

Trefoil-3l4zA02

A:7-47

Asymmetric/Biological Unit(hide GO term definitions)

Chain A (MGA_HUMAN | O43451)

molecular function
	GO:0004558	alpha-1,4-glucosidase activity	Catalysis of the hydrolysis of terminal, non-reducing alpha-(1->4)-linked alpha-D-glucose residues with release of alpha-D-glucose.
	GO:0016160	amylase activity	Catalysis of the hydrolysis of amylose or an amylose derivative.
	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:0004339	glucan 1,4-alpha-glucosidase activity	Catalysis of the hydrolysis of terminal (1->4)-linked alpha-D-glucose residues successively from non-reducing ends of the chains with release of beta-D-glucose.
	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:0004553	hydrolase activity, hydrolyzing O-glycosyl compounds	Catalysis of the hydrolysis of any O-glycosyl bond.
	GO:0032450	maltose alpha-glucosidase activity	Catalysis of the reaction: alpha-maltose + H2O = 2 alpha-D-glucose.
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:0000023	maltose metabolic process	The chemical reactions and pathways involving the disaccharide maltose (4-O-alpha-D-glucopyranosyl-D-glucopyranose), an intermediate in the catabolism of glycogen and starch.
	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:0044245	polysaccharide digestion	The whole of the physical, chemical, and biochemical processes carried out by living organisms to break down ingested polysaccharides into components that may be easily absorbed and directed into metabolism.
	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:0016324	apical plasma membrane	The region of the plasma membrane located at the apical end of the cell.
	GO:0070062	extracellular exosome	A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0005886	plasma membrane	The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

Asymmetric/Biological Unit
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	Cis Peptide Bonds
		Ala A:248 - Pro A:249	[ RasMol ]
		Gln A:136 - Pro A:137	[ RasMol ]
		Glu A:446 - Val A:447	[ RasMol ]
		Gly A:181 - Glu A:182	[ RasMol ]
		Pro A:835 - Ser A:836	[ RasMol ]

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	3.2.1.20
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	MGA_HUMAN \| O43451	:	2qly 2qmj 3ctt 3l4t 3l4u 3l4v 3l4w 3l4x 3l4y 3ton 3top

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (3, 10)

Sites (10, 10)

SS Bonds (2, 2)

Cis Peptide Bonds (5, 5)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (3, 3)

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