Cloning, Expression, and Homology Modeling of GroEL Protein from Leptospira interrogans Serovar Autumnalis Strain N2

Kalimuthusamy Natarajaseenivasan, Shanmughapriya Santhanam, Sridhar Velineni, Sergey C. Artiushin, John F. Timoney

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Leptospirosis is an infectious bacterial disease caused by Leptospira species. In this study, we cloned and sequenced the gene encoding the immunodominant protein GroEL from L. interrogans serovar Autumnalis strain N2, which was isolated from the urine of a patient during an outbreak of leptospirosis in Chennai, India. This groEL gene encodes a protein of 60 kDa with a high degree of homology (99% similarity) to those of other leptospiral serovars. Recombinant GroEL was overexpressed in Escherichia coli. Immunoblot analysis indicated that the sera from confirmed leptospirosis patients showed strong reactivity with the recombinant GroEL while no reactivity was observed with the sera from seronegative control patient. In addition, the 3D structure of GroEL was constructed using chaperonin complex cpn60 from Thermus thermophilus as template and validated. The results indicated a Z-score of -8.35, which is in good agreement with the expected value for a protein. The superposition of the Ca traces of cpn60 structure and predicted structure of leptospiral GroEL indicates good agreement of secondary structure elements with an RMSD value of 1.5 å. Further study is necessary to evaluate GroEL for serological diagnosis of leptospirosis and for its potential as a vaccine component.

Original languageEnglish (US)
Pages (from-to)151-157
Number of pages7
JournalGenomics, Proteomics and Bioinformatics
Volume9
Issue number4-5
DOIs
StatePublished - Oct 1 2011

Fingerprint

Leptospira interrogans serovar autumnalis
Chaperonin 60
Leptospirosis
Cloning
Organism Cloning
Homology
Reactivity
Chaperonins
Proteins
Protein
Gene encoding
Modeling
Escherichia coli
Gene
Z-score
Vaccines
Genes
Vaccine
Infectious Diseases
India

All Science Journal Classification (ASJC) codes

  • Genetics
  • Molecular Biology
  • Biochemistry
  • Computational Mathematics

Cite this

Natarajaseenivasan, Kalimuthusamy ; Santhanam, Shanmughapriya ; Velineni, Sridhar ; Artiushin, Sergey C. ; Timoney, John F. / Cloning, Expression, and Homology Modeling of GroEL Protein from Leptospira interrogans Serovar Autumnalis Strain N2. In: Genomics, Proteomics and Bioinformatics. 2011 ; Vol. 9, No. 4-5. pp. 151-157.
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Cloning, Expression, and Homology Modeling of GroEL Protein from Leptospira interrogans Serovar Autumnalis Strain N2. / Natarajaseenivasan, Kalimuthusamy; Santhanam, Shanmughapriya; Velineni, Sridhar; Artiushin, Sergey C.; Timoney, John F.

In: Genomics, Proteomics and Bioinformatics, Vol. 9, No. 4-5, 01.10.2011, p. 151-157.

Research output: Contribution to journalArticle

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