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Protein and DNA evolution: Statistics and combinatorics are the rules of the game Nature Precedings
Arunava Goswami; Srimoyee Duttagupta; Chirantan Chakraborty; Amita Pal; Pabitra Pal Choudhury; Sk Sarif Hassan.
Let us assume AVMAYDRYVAIC or MAYDRYVAICCP, most important signature domain of
olfactory receptor (OR) gene family assembled in evolution following simplest possible laws of statistics which says the addition of V after A in AVMAYDRYVAIC or addition of A after M are independent events. There are 20 amino acids present in nature so the probability of joint occurrence of such events is 1/400. Therefore for making a contiguous string of
AVMAYDRYVAIC or MAYDRYVAICCP, the probability would be 1 out of 2012. Over millions of years of evolution this has certainly happened and that is why we see such a signature sequence in OR1D2, OR1D subfamily member 2 as per "HORDE...
Tipo: Manuscript Palavras-chave: Biotechnology; Genetics & Genomics; Molecular Cell Biology; Bioinformatics.
Ano: 2010 URL: http://precedings.nature.com/documents/4859/version/1
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DNA Sequence Evolution through Integral Value Transformations Nature Precedings
Sk Sarif Hassan; Pabitra Pal Choudhury; Ranita Guha; Shantanav Chakraborty; Arunava Goswami.
In deciphering the DNA structures, evolutions and functions, Cellular Automata (CA) do have a significant role. DNA can be thought of as a one-dimensional multi-state CA, more precisely four states of CA namely A, T, C, and G which can be taken as numerals 0, 1, 2 and 3. Earlier, G.Ch. Sirakoulis et al reported the DNA structure, evolution and function through quaternary logic one dimensional CA and the authors have found the simulation results of DNA evolutions with the help of only four linear CA rules. The DNA sequences which are produced through the CA evolutions, however, are seen by our research team not to exist in the established databases of various genomes although the initial seed (initial global state of CA) was taken from the database. This...
Tipo: Manuscript Palavras-chave: Genetics & Genomics; Bioinformatics; Evolutionary Biology.
Ano: 2011 URL: http://precedings.nature.com/documents/5729/version/1
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An attempt to understand Barstar, Barnase and Olfactory receptor protein folding problems using mathematical biological approach Nature Precedings
Arunava Goswami; Sk Sarif Hassan; Pabitra Pal Choudhury.
Protein folding problem as attracted structural biologists immensely (1). Till date, correlation between X-ray crystallographic and NMR data are considered to be the best methods for determining structure of intra-cellular proteins. Generating crystals and finding correct experimental conditions for NMR are largly a gamble and resultant data processing highly time consuming. Even if, a large number of laboratories around the world and India make crystals of protein but majority of them fail to generate crystallographic data less than or equal to 10A resolution with currently available instruments. This means that X-ray crystallographic data have been generated from protein crystals with non-uniform lattices. We believe that a large portion of (chain of...
Tipo: Manuscript Palavras-chave: Biotechnology; Genetics & Genomics; Bioinformatics; Evolutionary Biology.
Ano: 2010 URL: http://precedings.nature.com/documents/4891/version/1
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