2VN7

Glycoside Hydrolase Family 15 Glucoamylase from Hypocrea jecorina

Summary for 2VN7

• Entry DOI: 10.2210/pdb2vn7/pdb
• Related: 2VN4
• Descriptor: GLUCOAMYLASE, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, alpha-D-mannopyranose, ... (6 entities in total)
• Functional Keywords: glucoamylase, glycoside hydrolase family 15, hydrolase
• Biological source: HYPOCREA JECORINA
• Total number of polymer chains: 1
• Total formula weight: 65459.98

Authors

Bott, R.,Sandgren, M.,Hansson, H. (deposition date: 2008-01-31, release date: 2008-05-20, Last modification date: 2024-10-09)

Primary citation

Bott, R.,Saldajeno, M.,Cuevas, W.,Ward, D.,Scheffers, M.,Aehle, W.,Karkehabadi, S.,Sandgren, M.,Hansson, H.
Three-Dimensional Structure of an Intact Glycoside Hydrolase Family 15 Glucoamylase from Hypocrea Jecorina.
Biochemistry, 47:5746-, 2008

PubMed Abstract: The three-dimensional structure of a complete Hypocrea jecorina glucoamylase has been determined at 1.8 A resolution. The presented structure model includes the catalytic and starch binding domains and traces the course of the 37-residue linker segment. While the structures of other fungal and yeast glucoamylase catalytic and starch binding domains have been determined separately, this is the first intact structure that allows visualization of the juxtaposition of the starch binding domain relative to the catalytic domain. The detailed interactions we see between the catalytic and starch binding domains are confirmed in a second independent structure determination of the enzyme in a second crystal form. This second structure model exhibits an identical conformation compared to the first structure model, which suggests that the H. jecorina glucoamylase structure we report is independent of crystal lattice contact restraints and represents the three-dimensional structure found in solution. The proposed starch binding regions for the starch binding domain are aligned with the catalytic domain in the three-dimensional structure in a manner that supports the hypothesis that the starch binding domain serves to target the glucoamylase at sites where the starch granular matrix is disrupted and where the enzyme might most effectively function.

PubMed: 18457422
DOI: 10.1021/BI702413K

Experimental method

X-RAY DIFFRACTION (1.9 Å)