9YRS

E. Coli Glucokinase - K214Q

Summary for 9YRS

• Entry DOI: 10.2210/pdb9yrs/pdb
• Descriptor: Glucokinase, PHOSPHATE ION (3 entities in total)
• Functional Keywords: chemical modification, binding properties, transferase
• Biological source: Escherichia coli
• Total number of polymer chains: 2
• Total formula weight: 71377.64

Authors

Andrews, J.R.W.,Sakon, J.,Fan, C. (deposition date: 2025-10-17, release date: 2026-05-13)

Primary citation

Andrews, J.,Sakon, J.,Fan, C.
Crystal structures of Escherichia coli glucokinase acetylation-mimicking variants and insights into the impact of acetylation.
Acta Crystallogr.,Sect.F, 82:160-166, 2026

PubMed Abstract: In this study, we report the crystal structures of K214Q and K216Q variants of Escherichia coli glucokinase (ecGLK), each of which is bound to phosphate in the active-site cleft. The structure of the K214Q variant was determined at 2.70 Å resolution and refined with an R and R of 0.140 and 0.190, respectively, while that of the K216Q variant was determined at 2.44 Å resolution with an R and R of 0.178 and 0.225, respectively. Both variants adopt an open conformation and maintain phosphate-binding interactions similar to the wild-type ecGLK. Structural comparison of the K214Q variant revealed large backbone deviations in the 214-224 α-helix, increased disorder in the loops surrounding the glucose-binding cleft and outward shifts of Asn99, Asp100, His160 and Glu187. Our previous study demonstrated that lysine acetylation at Lys214 and Lys216 impaired the activity of ecGLK, and here we show that acetylation mimics produced domain shifts, indicating those of lysine residues that could be essential for stabilizing the glucose-binding region of ecGLK.

PubMed: 41944126
DOI: 10.1107/S2053230X26002803

Experimental method

X-RAY DIFFRACTION (2.7 Å)