ISDA

Deposition Date 1999-02-24

Release Date 1999-05-03

Last Version Date 2024-11-13

Entry Detail

PDB ID:

1CXK

Keywords:

TRANSFERASE

Title:

COMPLEX BETWEEN A MALTONONAOSE SUBSTRATE AND BACILLUS CIRCULANS STRAIN 251 CGTASE E257Q/D229N

Biological Source:

Source Organism:

Bacillus circulans (Taxon ID: 1397)

Host Organism:

Bacillus subtilis

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.09 Å

R-Value Free:

0.21

R-Value Work:

0.15

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:PROTEIN (CYCLODEXTRIN-GLYCOSYLTRANSFERASE)
Gene (Uniprot):cgt
Mutations:E257Q, D229N
Chain IDs:A
Chain Length:686
Number of Molecules:1
Biological Source:Bacillus circulans

UniProt ID:P43379 Pfam ID:PF00128, PF02806, PF01833, PF00686 EC:2.4.1.19

Ligand Molecules

Peptide-like Molecules

PRD_900001

PRD_900010

Primary Citation

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

Uitdehaag, J.C, Mosi, R, Kalk, K.H, van der Veen, B.A, Dijkhuizen, L, Withers, S.G, Dijkstra, B.W, Mosi, R, Sham, H, Uitdehaag, J.C, Ruiterkamp, R, Dijkstra, B.W, Withers, S.G, Strokopytov, B, Knegtel, R.M, Penninga, D, Rozeboom, H.J, Kalk, K.H, Dijkhuizen, L, Dijkstra, B.W, Knegtel, R.M, Strokopytov, B, Penninga, D, Faber, O.G, Rozeboom, H.J, Kalk, K.H, Dijkhuizen, L, Dijkstra, B.W, Lawson, C.L, van Montfort, R, Strokopytov, B, Rozeboom, H.J, Kalk, K.H, de Vries, G.E, Penninga, D, Dijkhuizen, L, Dijkstra, B.W.Show

Nat.Struct.Biol. 6 432 436 (1999)

PMID: 10331869 DOI: 10.1038/8235

Abstact

Cyclodextrin glycosyltransferase (CGTase) is an enzyme of the alpha-amylase family, which uses a double displacement mechanism to process alpha-linked glucose polymers. We have determined two X-ray structures of CGTase complexes, one with an intact substrate at 2.1 A resolution, and the other with a covalently bound reaction intermediate at 1.8 A resolution. These structures give evidence for substrate distortion and the covalent character of the intermediate and for the first time show, in atomic detail, how catalysis in the alpha-amylase family proceeds by the concerted action of all active site residues.

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Primary Citation of related structures