COMPLEX BETWEEN A COVALENT INTERMEDIATE AND BACILLUS CIRCULANS STRAIN 251 CGTASE E257Q

4-DEOXY-ALPHA-D-GLUCOSE; 4-deoxy-D-glucose; 4-deoxy-glucose

1-FLUORO-ALPHA-1-DEOXY-D-GLUCOSE; alpha-D-glucosyl fluoride; D-glucosyl fluoride; glucosyl fluoride

X-ray structures along the reaction pathway of cyclodextrin glycosyltransferase elucidate catalysis in the alpha-amylase family.

Reassessment of acarbose as a transition state analogue inhibitor of cyclodextrin glycosyltransferase.

Structure of cyclodextrin glycosyltransferase complexed with a maltononaose inhibitor at 2.6 angstrom resolution. Implications for product specificity.

Crystallographic studies of the interaction of cyclodextrin glycosyltransferase from Bacillus circulans strain 251 with natural substrates and products.

Nucleotide sequence and X-ray structure of cyclodextrin glycosyltransferase from Bacillus circulans strain 251 in a maltose-dependent crystal form.

PROTEIN (CYCLODEXTRIN-GLYCOSYLTRANSFERASE)

4-deoxy-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranosyl fluoride

APDTSVSNKQNFSTDVIYQIFTDRFSDGNPANNPTGAAFDGTCTNLRLYCGGDWQGIINKINDGYLTGMGVTAIWISQPV
ENIYSIINYSGVNNTAYHGYWARDFKKTNPAYGTIADFQNLIAAAHAKNIKVIIDFAPNHTSPASSDQPSFAENGRLYDN
GTLLGGYTNDTQNLFHHNGGTDFSTTENGIYKNLYDLADLNHNNSTVDVYLKDAIKMWLDLGIDGIRMDAVKHMPFGWQK
SFMAAVNNYKPVFTFGQWFLGVNEVSPENHKFANESGMSLLDFRFAQKVRQVFRDNTDNMYGLKAMLEGSAADYAQVDDQ
VTFIDNHDMERFHASNANRRKLEQALAFTLTSRGVPAIYYGTEQYMSGGTDPDNRARIPSFSTSTTAYQVIQKLAPLRKS
NPAIAYGSTQERWINNDVLIYERKFGSNVAVVAVNRNLNAPASISGLVTSLPQGSYNDVLGGLLNGNTLSVGSGGAASNF
TLAAGGTAVWQYTAATATPTIGHVGPMMAKPGVTITIDGRGFGSSKGTVYFGTTAVSGADITSWEDTQIKVKIPAVAGGN
YNIKVANAAGTASNVYDNFEVLSGDQVSVRFVVNNATTALGQNVYLTGSVSELGNWDPAKAIGPMYNQVVYQYPNWYYDV
SVPAGKTIEFKFLKKQGSTVTWEGGSNHTFTAPSSGTATINVNWQP

MUTANTS WERE CONSTRUCTED IN ECOLI STRAIN MC1061

ELECTRON DENSITY AT SUBSITES +1 AND +2 IS AMBIGUOUS, THREE WATER MOLECULES WERE PLACED THERE TO REPRESENT THIS DENSITY

CRYSTAL SOAKED FIRST IN 4-DEOXY MALTOSE,THEN IN 4-DEOXY MALTOTRIOSYL ALPHA- FLUORIDE, pH 6.10

CA: RESIDUES 688 AND 689 ARE CALCIUM IONS.

GLC: THE GLC O1 ATOM IS CONNECTED TO THE C4 ATOM OF THE
PREVIOUS RESIDUE VIA AN ALPHA(1->4) GLYCOSIDIC BOND
A LOOSE O1 IS A REDUCING END WITH
ALPHA-ANOMERIC CONFIGURATION

GLF IS IDENTICAL TO AN ALPHA GLUCOSE (GLC)
EXCEPT THAT THE O1 ATOM HAS BEEN EXCHANGED
BY A FLUORINE (F1) ATOM

G4D IS IDENTICAL TO AN ALPHA GLUCOSE (GLC)
EXCEPT THAT ITS O4 ATOM IS ABSENT (4-DEOXY)

SER 400 AFTER REINTERPRETATION OF SEQUENCE DATA.

GLYCOSYL HYDROLASE FAMILY 13, ALPHA-AMYLASE FAMILY, INTERMEDIATE COMPLEX, 4- DEOXYMALTOTRIOSE, GLYCOSYLTRANSFERASE

THIRD MALTOSE BINDING SITE. THIS SITE ALSO INCLUDES RESIDUES SER 537, ALA 539, AND ASP 540 FROM A SYMMETRY-RELATED MOLECULE.