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Publication Abstract from PubMed

Flo1p and Lg-Flo1p are two cell-wall adhesins belonging to the Flo (flocculation) protein family from the yeasts Saccharomyces cerevisiae and S. pastorianus. The main function of these modular proteins endowed with calcium-dependent lectin activity is to mediate cell-cell adhesion events during yeast flocculation, a process which is well known at the cellular level but still not fully characterized from a molecular perspective. Recently, structural features of the N-terminal Flo lectin domains, including the N-terminal domain of Lg-Flo1p (N-Lg-Flo1p), and their interactions with carbohydrate molecules have been investigated. However, structural data concerning the N-terminal domain of Flo1p (N-Flo1p), which is the most specific among the Flo proteins, are missing and information about the N-Lg-Flo1p-carbohydrate interaction still lacks detailed structural insight. Here, the crystallization and preliminary X-ray characterization of the apo form and the mannose complex of N-Flo1p and X-ray analysis of N-Lg-Flo1p crystals soaked in alpha-1,2-mannobiose are reported. The N-Flo1p crystals diffracted to a resolution of 1.43 A in the case of the apo form and to 2.12 A resolution for the mannose complex. Both crystals were orthorhombic and belonged to space group P212121, with one molecule in the asymmetric unit. The N-Lg-Flo1p-alpha-1,2-mannobiose complex crystal diffracted to 1.73 A resolution and belonged to the monoclinic space group P1211 with two molecules in the asymmetric unit.

The mannose-specific lectin domains of Flo1p from Saccharomyces cerevisiae and Lg-Flo1p from S. pastorianus: crystallization and preliminary X-ray diffraction analysis of the adhesin-carbohydrate complexes.,Ielasi FS, Goyal P, Sleutel M, Wohlkonig A, Willaert RG Acta Crystallogr Sect F Struct Biol Cryst Commun. 2013 Jul;69(Pt 7):779-82. doi: , 10.1107/S1744309113015030. Epub 2013 Jun 28. PMID:23832207^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.