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Front Microbiol. 2016 Mar 15;7:280. doi: 10.3389/fmicb.2016.00280. eCollection 2016.

Candida albicans Agglutinin-Like Sequence (Als) Family Vignettes: A Review of Als Protein Structure and Function.

Author information

1
Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana IL, USA.
2
Department of Life Sciences, Imperial College London London, UK.

Abstract

Approximately two decades have passed since the description of the first gene in the Candida albicans ALS (agglutinin-like sequence) family. Since that time, much has been learned about the composition of the family and the function of its encoded cell-surface glycoproteins. Solution of the structure of the Als adhesive domain provides the opportunity to evaluate the molecular basis for protein function. This review article is formatted as a series of fundamental questions and explores the diversity of the Als proteins, as well as their role in ligand binding, aggregative effects, and attachment to abiotic surfaces. Interaction of Als proteins with each other, their functional equivalence, and the effects of protein abundance on phenotypic conclusions are also examined. Structural features of Als proteins that may facilitate invasive function are considered. Conclusions that are firmly supported by the literature are presented while highlighting areas that require additional investigation to reveal basic features of the Als proteins, their relatedness to each other, and their roles in C. albicans biology.

KEYWORDS:

Als proteins; Candida albicans; adhesion; aggregation; attachment; fungus; gene family; invasion

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