5J51

Structure of tetrameric jacalin complexed with Gal alpha-(1,4) Gal

Summary for 5J51

• Entry DOI: 10.2210/pdb5j51/pdb
• Related: 1JAC 1KU8 1KUJ 1M26 1UGW 1UGX 1UGY 1UH0 1UH1 1WS4 1WS5 4R6N 4R6O 4R6P 4R6Q 4R6R 5J4X 5J50 5J52
• Descriptor: Agglutinin alpha chain, Agglutinin beta-3 chain, alpha-D-galactopyranose-(1-4)-alpha-D-galactopyranose, ... (7 entities in total)
• Functional Keywords: plant lectins, sugar binding protein, galactose specific lectin, beta-prism i fold, post translational proteolysis, t-antigen binding protein, reducing, non-reducing sugars
• Biological source: Artocarpus integer (Jack fruit); More
• Total number of polymer chains: 8
• Total formula weight: 69359.78

Authors

Abhinav, K.V.,Sharma, K.,Surolia, A.,Vijayan, M. (deposition date: 2016-04-01, release date: 2016-12-14, Last modification date: 2023-11-08)

Primary citation

Abhinav, K.V.,Sharma, K.,Surolia, A.,Vijayan, M.
Effect of linkage on the location of reducing and nonreducing sugars bound to jacalin.
IUBMB Life, 68:971-979, 2016

PubMed Abstract: The crystal structures of jacalin complexed with Gal α-(1,4) Gal and Gal α-(1,3) Gal β-(1,4) Gal have been determined with the primary objective of exploring the effect of linkage on the location of reducing and non-reducing sugars in the extended binding site of the lectin, an issue which has not been studied thoroughly. Contrary to the earlier surmise based on simple steric considerations, the two structures demonstrate that α-linked sugars can bind to jacalin with nonreducing sugar at the primary binding site. This is made possible substantially on account of the hitherto underestimated plasticity of a non-polar region of the extended binding site. Modeling studies involving conformational search and energy minimization, along with available crystallographic and thermodynamic data, indicate a strong preference for complexation with Gal β-(1,3) Gal with the reducing Gal at the primary site, followed by that with Gal α-(1,3) Gal, with the reducing or non-reducing Gal located at the primary binding site. This observation is in consonance with the facility of jacalin to bind mucin type O-glycans containing T-antigen core. © 2016 IUBMB Life, 68(12):971-979, 2016.

PubMed: 27808459
DOI: 10.1002/iub.1572

Experimental method

X-RAY DIFFRACTION (1.67 Å)