3SH3

Crystal structure of a pro-inflammatory lectin from the seeds of Dioclea wilsonii STANDL

Summary for 3SH3

• Entry DOI: 10.2210/pdb3sh3/pdb
• Related: 3RRD 3RS6
• Descriptor: Lectin alpha chain, MANGANESE (II) ION, CALCIUM ION, ... (7 entities in total)
• Functional Keywords: legume lectin, pro-inflammatory effect, jelly-roll, carbohydrate binding protein
• Biological source: Dioclea wilsonii (Wilson's clusterpea)
• Cellular location: Vacuole, aleurone grain: P86624
• Total number of polymer chains: 1
• Total formula weight: 26299.58

Authors

Rangel, T.B.A.,Rocha, B.A.M.,Bezerra, G.A.,Bezerra, M.J.B.,Nascimento, K.S.,Nagano, C.S.,Sampaio, A.H.,Assreuy, A.M.S.,Gruber, K.,Delatorre, P.,Cavada, B.S. (deposition date: 2011-06-15, release date: 2011-10-05, Last modification date: 2024-02-28)

Primary citation

Rangel, T.B.,Rocha, B.A.,Bezerra, G.A.,Assreuy, A.M.,Pires, A.F.,Nascimento, A.S.,Bezerra, M.J.,Nascimento, K.S.,Nagano, C.S.,Sampaio, A.H.,Gruber, K.,Delatorre, P.,Fernandes, P.M.,Cavada, B.S.
Crystal structure of a pro-inflammatory lectin from the seeds of Dioclea wilsonii Standl.
Biochimie, 94:525-532, 2012

PubMed Abstract: The crystal structure and pro-inflammatory property of a lectin from the seeds of Dioclea wilsonii (DwL) were analyzed to gain a better understanding of structure/function relationships of Diocleinae lectins. Following crystallization and structural determination by standard molecular replacement techniques, DwL was found to be a tetramer based on PISA analysis, and composed by two metal-binding sites per monomer and loops which are involved in molecular oligomerization. DwL presents 96% and 99% identity with two other previously described lectins of Dioclea rostrata (DRL) and Dioclea grandiflora (DGL). DwL differs structurally from DVL and DRL with regard to the conformation of the carbohydrate recognition domain and related biological activities. The structural analysis of DwL in comparison to other Diocleinae lectins can be related to the differences in the dose-dependent pro-inflammatory effect elicited in Wistar rats, probably via specific interactions with mast cells complex carbohydrate, resulting in significant paw edema. DwL appears to be involved in positive modulation of mast cell degranulation via recognition of surface carbohydrates. Since this recognition is dependent on site volume and CRD configuration, edematogenesis mediated by resident cells varies in potency and efficacy among different Diocleinae lectins.

PubMed: 21924319
DOI: 10.1016/j.biochi.2011.09.001

Experimental method

X-RAY DIFFRACTION (2.3 Å)