Copper, Zinc-Superoxide Dismutase from Clinically Isolated Escherichia coli: Cloning, Analysis of sodC and Its Possible Role in Pathogenicity


Autoria(s): Sanjay, MK; Srideshikan, SM; Vanishree, VL; Usha, MS; Raj, Philip A; Gaddad, SM; Shivannavar, CT
Data(s)

01/07/2011

Resumo

Superoxide dismutase has been discovered within the periplasm of several Gram-negative pathogens. We studied the Cu,Zn-SOD enzyme in Escherichia coli isolated from clinical samples (stool samples) collected from patients suffering from diarrhea. Antibiogram studies of the isolates were carried out to determine the sensitive and resistant strains. The metal co-factor present in the enzyme was confirmed by running samples in native gels and inhibiting with 2 mM potassium cyanide. A 519 bp sodC gene was amplified from resistant and sensitive strains of Escherichia coli. Cloning and sequencing of the sodC gene indicated variation in the protein and amino acid sequences of sensitive and resistant isolates. The presence of sodC in highly resistant Escherichia coli isolates from diarrheal patients indicates that sodC may play role in enhancing the pathogenicity by protecting cells from exogenous sources of superoxide, such as the oxidative burst of phagocytes. The presence of SodC could be one of the factors for bacterial virulence.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/39605/1/Copper%2C_Zinc.pdf

Sanjay, MK and Srideshikan, SM and Vanishree, VL and Usha, MS and Raj, Philip A and Gaddad, SM and Shivannavar, CT (2011) Copper, Zinc-Superoxide Dismutase from Clinically Isolated Escherichia coli: Cloning, Analysis of sodC and Its Possible Role in Pathogenicity. In: Indian Journal of Microbiology, 51 (3). pp. 326-331.

Publicador

Springer

Relação

http://www.springerlink.com/content/06wk177603127757/

http://eprints.iisc.ernet.in/39605/

Palavras-Chave #Biochemistry
Tipo

Journal Article

NonPeerReviewed