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  • Title: The Aspergillus niger annexin, anxC3.1 is constitutively expressed and is not essential for protein secretion.
    Author: Khalaj V, Hey P, Smith L, Robson GD, Brookman J.
    Journal: FEMS Microbiol Lett; 2004 Oct 01; 239(1):163-9. PubMed ID: 15451115.
    Abstract:
    An annexin, anxC3.1, was isolated and characterised from the industrially important filamentous fungus Aspergillus niger. anxC3.1 is a single copy gene encoding a 506 amino acid predicted protein which contains four annexin repeats. Disruption of the anxC3.1 gene did not lead to any visible changes in phenotype, nor in the levels of secreted protein, nor specifically in glucoamylase production, suggesting no major role in secretion. anxC3.1 expression was found to be unaltered under a variety of conditions such as increased secretion, altered nitrogen source, heat shock, and decreased Ca2+ levels, indicating that anxC3.1 is constitutively expressed. This is the first reported functional characterisation of a fungal annexin.
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