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• W2891662736 abstract "Galactans are linear polysaccharides of β(1→4)-linked galactose residues. Although they can antagonize galectin function, the nature of their binding to galectins needs to be better defined to develop them as drugs. Here, we investigated interactions between galectin-3 (Gal-3) and a series of galactans ranging in weight average molecular weight from 670 to 7550 Da. 15N-1H HSQC NMR studies with 15N-labeled Gal-3 carbohydrate recognition domain (CRD) indicate that each of these galactans interacts primarily with residues in β-strands 4, 5 and 6 on the canonical, β-galactoside sugar binding S-face. Although these galactans also bind to full length Gal-3 (CRD plus N-terminal tail) to the same extent, it appears that binding to the S-face attenuates interactions between the CRD F-face and N-terminal tail, making interpretation of site-specific binding unclear. Following assignment of galactan 13C and 1H resonances using HSQC, HMBC and TOCSY experiments, we used 13C-1H HSQC data to demonstrate that the Gal-3 CRD binds to the terminal, non-reducing end of these galactans, regardless of their size, but with binding affinity increasing as the galactan chain length increases. Overall, our findings increase understanding as to how galactans interact with Gal-3 at the non-reducing, terminal end of galactose-containing polysaccharides as found on the cell surface." @default.
• W2891662736 created "2018-09-27" @default.
• W2891662736 creator A5005071062 @default.
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• W2891662736 creator A5080135772 @default.
• W2891662736 date "2018-09-11" @default.
• W2891662736 modified "2023-10-16" @default.
• W2891662736 title "Galectin-3 binds selectively to the terminal, non-reducing end of β(1→4)-galactans, with overall affinity increasing with chain length" @default.
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• W2891662736 doi "https://doi.org/10.1093/glycob/cwy085" @default.
• W2891662736 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30204870" @default.
• W2891662736 hasPublicationYear "2018" @default.
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