ISDA

Deposition Date 2006-04-26

Release Date 2007-03-13

Last Version Date 2024-10-09

Entry Detail

PDB ID:

2GSJ

Keywords:

HYDROLASE

Title:

cDNA cloning and 1.75A crystal structure determination of PPL2, a novel chimerolectin from Parkia platycephala seeds exhibiting endochitinolytic activity

Biological Source:

Source Organism:

Parkia platycephala (Taxon ID: 185447)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.73 Å

R-Value Free:

0.19

R-Value Work:

0.16

R-Value Observed:

0.17

Space Group:

P 21 21 21

Download Validation Report

Macromolecular Entities

Polymer Type:polypeptide(L)
Molecule:protein PPL-2
Chain IDs:A
Chain Length:271
Number of Molecules:1
Biological Source:Parkia platycephala

Ligand Molecules

SO4

Primary Citation

cDNA cloning and 1.75 A crystal structure determination of PPL2, an endochitinase and N-acetylglucosamine-binding hemagglutinin from Parkia platycephala seeds

Cavada, B.S, Moreno, F.B, da Rocha, B.A, de Azevedo Jr, W.F, Castellon, R.E.R, Goersch, G.V, Nagano, C.S, de Souza, E.P, Nascimento, K.S, Radis-Baptista, G, Delatorre, P, Leroy, Y, Toyama, M.H, Pinto, V.P, Sampaio, A.H, Barettino, D, Debray, H, Calvete, J.J, Sanz, L.Show

Febs J. 273 3962 3974 (2006)

PMID: 16934035 DOI: 10.1111/j.1742-4658.2006.05400.x

Abstact

Parkia platycephala lectin 2 was purified from Parkia platycephala (Leguminosae, Mimosoideae) seeds by affinity chromatography and RP-HPLC. Equilibrium sedimentation and MS showed that Parkia platycephala lectin 2 is a nonglycosylated monomeric protein of molecular mass 29 407+/-15 Da, which contains six cysteine residues engaged in the formation of three intramolecular disulfide bonds. Parkia platycephala lectin 2 agglutinated rabbit erythrocytes, and this activity was specifically inhibited by N-acetylglucosamine. In addition, Parkia platycephala lectin 2 hydrolyzed beta(1-4) glycosidic bonds linking 2-acetoamido-2-deoxy-beta-D-glucopyranose units in chitin. The full-length amino acid sequence of Parkia platycephala lectin 2, determined by N-terminal sequencing and cDNA cloning, and its three-dimensional structure, established by X-ray crystallography at 1.75 A resolution, showed that Parkia platycephala lectin 2 is homologous to endochitinases of the glycosyl hydrolase family 18, which share the (betaalpha)8 barrel topology harboring the catalytic residues Asp125, Glu127, and Tyr182.

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Primary Citation of related structures