X-ray and molecular-dynamics studies on Mycobacterium leprae single-stranded DNA-binding protein and comparison with other eubacterial SSB structuresKaushal, P.S., Singh, P., Sharma, A., Muniyappa, K., Vijayan, M.
(2010) Acta Crystallogr.,Sect.D 66: 1048-1058
- PubMed: 20944238
- DOI: 10.1107/S0907444910032208
- Primary Citation of Related Structures:
- PubMed Abstract:
- Structure of Mycobacterium smegmatis single-stranded DNA-binding protein and a comparative study involving homologus SSBs: biological implications of structural plasticity and variability in quaternary association
Saikrishnan, K.,Manjunath, G.P.,Singh, P.,Jeyakanthan, J.,Dauter, Z.,Sekar, K.,Muniyappa, K.,Vijayan, M.
(2005) Acta Crystallogr.,Sect.D 61: 1140
- Crystal structure of human mitochondrial single-stranded DNA binding protein at 2.4 A resolution
Yang, C.,Curth, U.,Urbanke, C.,Kang, C.
(1997) Nat.Struct.Mol.Biol. 4: 153
- Structure of Mycobacterium tuberculosis single-stranded DNA-binding protein. Variability in quaternary structure and its implications
Saikrishnan, K.,Jeyakanthan, J.,Venkatesh, J.,Acharya, N.,Sekar, K.,Varshney, U.,Vijayan, M.
(2003) J.Mol.Biol. 331: 385
- Crystal structure of the homo-tetrameric DNA binding domain of Escherichia coli single-stranded DNA-binding protein determined by multiwavelength x-ray diffraction on the selenomethionyl protein at 2.9-A resolution
Raghunathan, S.,Ricard, C.S.,Lohman, T.M.,Waksman, G.
(1997) Proc.Natl.Acad.Sci.USA 94: 6652
The crystal structures of two forms of Mycobacterium leprae single-stranded DNA-binding protein (SSB) have been determined at 2.05 and 2.8 Å resolution. Comparison of these structures with the structures of other eubacterial SSBs indicates considerab ...
The crystal structures of two forms of Mycobacterium leprae single-stranded DNA-binding protein (SSB) have been determined at 2.05 and 2.8 Å resolution. Comparison of these structures with the structures of other eubacterial SSBs indicates considerable variation in their quaternary association, although the DNA-binding domains in all of them exhibit the same OB-fold. This variation has no linear correlation with sequence variation, but could be related to variation in protein stability. Molecular-dynamics simulations have been carried out on tetrameric molecules derived from the two forms and the prototype Escherichia coli SSB and the individual subunits of both proteins. Together, the X-ray studies and molecular-dynamics simulations yield information on the relatively rigid and flexible regions of the molecule and on the effect of oligomerization on flexibility. The simulations provide insight into the changes in subunit structure on oligomerization. They also provide insight into the stability and time evolution of the hydrogen bonds/water bridges that connect the two pairs of monomers in the tetramer.
Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560 012, India.