4U2A: Structure Of A Lectin From The Seeds Of Vatairea Macrocarpa Complexed With Galnac

Citation:
Abstract
Plant lectins have been studied as histological markers and promising antineoplastic molecules for a long time, and structural characterization of different lectins bound to specific cancer epitopes has been carried out successfully. The crystal structures of Vatairea macrocarpa (VML) seed lectin in complex with GalNAc-alpha-O-Ser (Tn antigen) and GalNAc have been determined at the resolution of 1.4A and 1.7A, respectively. Molecular docking analysis of this new structure and other Tn-binding legume lectins to O-mucin fragments differently decorated with this antigen provides a comparative binding profile among these proteins, stressing that subtle alterations that may not influence monosaccharide binding can, nonetheless, directly impact the ability of these lectins to recognize naturally occurring antigens. In addition to the specific biological effects of VML, the structural and binding similarities between it and other lectins commonly used as histological markers (e.g., VVLB4 and SBA) strongly suggest VML as a candidate tool for cancer research.
PDB ID: 4U2ADownload
MMDB ID: 125821
PDB Deposition Date: 2014/7/16
Updated in MMDB: 2015/01
Experimental Method:
x-ray diffraction
Resolution: 1.74  Å
Source Organism:
Similar Structures:
Biological Unit for 4U2A: tetrameric; determined by author and by software (PISA)
Molecular Components in 4U2A
Label Count Molecule
Proteins (4 molecules)
4
Seed Lectin
Molecule annotation
Chemicals (36 molecules)
1
4
2
4
3
4
4
4
5
8
6
12
* Click molecule labels to explore molecular sequence information.

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