Structure of PDB 2cxg Chain A

Receptor sequence

>2cxgA (length=686) Species: 1397 (Niallia circulans) [Search protein sequence]

APDTSVSNKQNFSTDVIYQIFTDRFSDGNPANNPTGAAFDGTCTNLRLYC
GGDWQGIINKINDGYLTGMGVTAIWISQPVENIYSIINYSGVNNTAYHGY
WARDFKKTNPAYGTIADFQNLIAAAHAKNIKVIIDFAPNHTSPASSDQPS
FAENGRLYDNGTLLGGYTNDTQNLFHHNGGTDFSTTENGIYKNLYDLADL
NHNNSTVDVYLKDAIKMWLDLGIDGIRMDAVKHMPFGWQKSFMAAVNNYK
PVFTFGEWFLGVNEVSPENHKFANESGMSLLDFRFAQKVRQVFRDNTDNM
YGLKAMLEGSAADYAQVDDQVTFIDNHDMERFHASNANRRKLEQALAFTL
TSRGVPAIYYGTEQYMSGGTDPDNRARIPSFSTSTTAYQVIQKLAPLRKC
NPAIAYGSTQERWINNDVLIYERKFGSNVAVVAVNRNLNAPASISGLVTS
LPQGSYNDVLGGLLNGNTLSVGSGGAASNFTLAAGGTAVWQYTAATATPT
IGHVGPMMAKPGVTITIDGRGFGSSKGTVYFGTTAVSGADITSWEDTQIK
VKIPAVAGGNYNIKVANAAGTASNVYDNFEVLSGDQVSVRFVVNNATTAL
GQNVYLTGSVSELGNWDPAKAIGPMYNQVVYQYPNWYYDVSVPAGKTIEF
KFLKKQGSTVTWEGGSNHTFTAPSSGTATINVNWQP

3D structure

PDB

2cxg X-ray structure of cyclodextrin glycosyltransferase complexed with acarbose. Implications for the catalytic mechanism of glycosidases.

Chain

Resolution

2.5 Å

3D
structure

Catalytic site residues are labeled in the structure
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Enzymatic activity

Catalytic site (original residue number in PDB)	D135 R227 D229 E257 H327 D328
Catalytic site (residue number reindexed from 1)	D135 R227 D229 E257 H327 D328
Enzyme Commision number	2.4.1.19: cyclomaltodextrin glucanotransferase.

Interaction with ligand

Site #	Ligand	Ligand chain	Binding residues on receptor (original residue number in PDB)	Binding residues on receptor (residue number reindexed from 1)
BS01	GLC	A	W413 I414	W413 I414
BS02	GLC	A	E411 R412 G446	E411 R412 G446
BS03	GLC	A	K232 F259	K232 F259
BS04	G6D	A	A230 H233 E257 D328	A230 H233 E257 D328
BS05	GLC	A	T598 A599 L600 Y633	T598 A599 L600 Y633
BS06	GLC	A	L600 G601 Q602 N603 N627 W636	L600 G601 Q602 N603 N627 W636
BS07	GLC	A	K651 W662	K651 W662
BS08	GLC	A	W616 N667	W616 N667
BS09	ACI	A	Y100 H140 D229 E257 H327 D328	Y100 H140 D229 E257 H327 D328
BS10	GLC	A	Y100 W101 L197 D371 R375	Y100 W101 L197 D371 R375
BS11	CA	A	D27 N29 N32 N33 G51 D53	D27 N29 N32 N33 G51 D53
BS12	CA	A	N139 I190 D199 H233	N139 I190 D199 H233

Gene Ontology

	Molecular Function
GO:0003824	catalytic activity
GO:0004556	alpha-amylase activity
GO:0016757	glycosyltransferase activity
GO:0030246	carbohydrate binding
GO:0043169	cation binding
GO:0043895	cyclomaltodextrin glucanotransferase activity
GO:0046872	metal ion binding
GO:2001070	starch binding

	Biological Process
GO:0005975	carbohydrate metabolic process

	Cellular Component
GO:0005576	extracellular region

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Molecular Function

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Biological Process

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Cellular Component

External links

PDB	RCSB:2cxg, PDBe:2cxg, PDBj:2cxg
PDBsum	2cxg
PubMed	7857935
UniProt	P43379\|CDGT2_NIACI Cyclomaltodextrin glucanotransferase (Gene Name=cgt)

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