Genetically encoded fragment-based discovery of glycopeptide ligands for carbohydrate-binding proteins.
Genetically encoded fragment-based discovery of glycopeptide ligands for carbohydrate-binding proteins.
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DOI:
10.1021/ja511237n
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发表时间:
2015-04-29
影响因子:
15
通讯作者:
Derda R
中科院分区:
文献类型:
--
作者:
Ng S;Lin E;Kitov PI;Tjhung KF;Gerlits OO;Deng L;Kasper B;Sood A;Paschal BM;Zhang P;Ling CC;Klassen JS;Noren CJ;Mahal LK;Woods RJ;Coates L;Derda R
We describe an approach to accelerate the search for competitive inhibitors for carbohydrate-recognition domains (CRDs). Genetically encoded fragment-based discovery (GE-FBD) uses selection of phage-displayed glycopeptides to dock a glycan fragment at the CRD and guide selection of synergistic peptide motifs adjacent to the CRD. Starting from concanavalin A (ConA), a mannose (Man)-binding protein, as a bait, we narrowed a library of 108 glycopeptides to 86 leads that share a consensus motif, Man-WYD. Validation of synthetic leads yielded Man-WYDLF that exhibited 40–50-fold enhancement in affinity over methyl α-D-mannopyranoside (MeMan). Lectin array suggested specificity: Man-WYD derivative bound only to 3 out of 17 proteins—ConA, LcH, and PSA—that bind to Man. An X-ray structure of ConA:Man-WYD proved that the trimannoside core and Man-WYD exhibit identical CRD docking, but their extra-CRD binding modes are significantly different. Still, they have comparable affinity and selectivity for various Man-binding proteins. The intriguing observation provides new insight into functional mimicry of carbohydrates by peptide ligands. GE-FBD may provide an alternative to rapidly search for competitive inhibitors for lectins.
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影响因子:
15
作者:
Egger, Jonas;Weckerle, Celine;Ernst, Beat
通讯作者:
Ernst, Beat
影响因子:
15
作者:
Borrok, M. Jack;Kiessling, Laura L.
通讯作者:
Kiessling, Laura L.
DOI:
10.1073/pnas.89.12.5398
发表时间:
1992-06-15
影响因子:
11.1
作者:
SCOTT, JK;LOGANATHAN, D;GOLDSTEIN, IJ
通讯作者:
GOLDSTEIN, IJ
影响因子:
56.9
作者:
Feinberg, H;Mitchell, DA;Weis, WI
通讯作者:
Weis, WI
影响因子:
3.2
作者:
Andreini, Manuel;Doknic, Daniela;Bernardi, Anna
通讯作者:
Bernardi, Anna