4NDT

Crystal structure of L. decastes alpha-galactosyl-binding lectin, orthorhombic crystal form

Summary for 4NDT

• Entry DOI: 10.2210/pdb4ndt/pdb
• Related: 4NDS 4NDU 4NDV
• Descriptor: Alpha-galactosyl-binding lectin, SULFATE ION (3 entities in total)
• Functional Keywords: lectin, sugar binding protein
• Biological source: Lyophyllum decastes (Fried chicken mushroom)
• Total number of polymer chains: 1
• Total formula weight: 10387.44

Authors

Van Eerde, A.,Grahn, E.,Krengel, U. (deposition date: 2013-10-27, release date: 2014-12-10, Last modification date: 2024-10-16)

Primary citation

van Eerde, A.,Grahn, E.M.,Winter, H.C.,Goldstein, I.J.,Krengel, U.
Atomic-resolution structure of the alpha-galactosyl binding Lyophyllum decastes lectin reveals a new protein family found in both fungi and plants.
Glycobiology, 25:492-501, 2015

PubMed Abstract: The crystal structure of the α-galactosyl binding Lyophyllum decastes lectin (LDL) was determined to 1.0 Å resolution by sulfur single-wavelength anomalous diffraction (SAD). The 10 kDa protein exhibits no sequence similarity to any protein with known structure and adopts a unique lectin fold, where a core of two antiparallel β-sheets at the heart of the homodimer is connected to the periphery of the structure by intramolecular disulfide bridges. This fold suggests that LDL is secreted, which sets it apart from other mushroom lectins. Structures of complexes between LDL and the ligands α-methylgalactoside and globotriose shed light on the binding specificity. Sequence comparison suggests a location and function of LDL and homologous proteins in or at the fungal cell wall. Structural comparison allows the identification of a superfamily of secreted proteins with the LDL fold, which may play a role at the interface between fungi and their environment.

PubMed: 25504801
DOI: 10.1093/glycob/cwu136

Experimental method

X-RAY DIFFRACTION (1.03 Å)