Phosphorylation controls the functioning of Staphylococcus aureus isocitrate dehydrogenase--favours biofilm formation.

Abstract:

:Isocitrate dehydrogenase (IDH) gene from Staphylococcus aureus ATCC12600 was cloned, sequenced and characterized (HM067707). PknB site was observed in the active site of IDH; thus, it was predicted as IDH may be regulated by phosphorylation. Therefore, in this study, PknB, alkaline phosphatase III (SAOV 2675) and IDH genes (JN695616, JN645811 and HM067707) of S. aureus ATCC12600 were over expressed from clones PV 1, UVPALP-3 and UVIDH 1. On passing the cytosloic fractions through nickel metal chelate column, pure enzymes were obtained. Phosphorylation of pure IDH by PknB resulted in the complete loss of activity and was restored upon dephosphorylation with SAOV 2675 which indicated that phosphorylation and dephosphorylation regulate IDH activity in S. aureus. Further, when S. aureus ATCC12600 was grown in BHI broth, decreased IDH activity and increased biofilm units were observed; therefore, this regulation of IDH alters redox status in this pathogen favouring biofilm formation.

authors

Prasad UV,Vasu D,Yeswanth S,Swarupa V,Sunitha MM,Choudhary A,Sarma PV

doi

10.3109/14756366.2014.959945

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

655-61

issue

4

eissn

1475-6366

issn

1475-6374

journal_volume

30

pub_type

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