Download MendeleyThree Dimensional Structure of Selenocosmia Huwena Lectin-I (Shl-I) from the Venom of the Spider Selenocosmia Huwena by 2D-NMR
Lu, S., Liang, S., Gu, X.(2000) J Protein Chem 18: 609
- PubMed: 10524779
- DOI: https://doi.org/10.1023/a:1020663619657
- Primary Citation of Related Structures:
1QK7 - PubMed Abstract:
The three-dimensional structure of native SHL-I, a lectin from the venom of the Chinese bird spider Selenocosmia huwena, has been determined from two-dimensional 1H NMR spectroscopy recorded at 500 and 600 MHz. The best 10 structures have NOE violation <0.3 A, dihedral violation <2 deg, and average root-mean-square differences of 0.85 + 0.06 A over backbone atoms. The structure consists of a three-stranded antiparallel beta-sheet and three turns. The three disulfide bridges and three-stranded antiparallel beta-sheet form a inhibitor cystine knot motif which is adopted by several other small proteins, such as huwentoxin-I, omega-conotoxin, and gurmarin. The C-terminal fragment from Leu28 to Trp32 adopts two sets of conformations corresponding to the cis and trans conformations of Pro31. The structure of SHL-I also has high similarity with that of the N-terminus of hevein, a lectin from rubber-tree latex.
Organizational Affiliation:
National Laboratory of Protein Engineering and Plant Genetic Engineering, Peking University, Beijing, China.
