title: Prediction of DNA-binding specificity in zinc finger proteins.
abstract: Zinc finger proteins interact via their individual fingers to three base pair subsites on the target DNA. The four key residue positions -1, 2, 3 and 6 on the alpha-helix of the zinc fingers have hydrogen bond interactions with the DNA. Mutating these key residues enables generation of a plethora of combinatorial possibilities that can bind to any DNA stretch of interest. Exploiting the binding specificity and affinity of the interaction between the zinc fingers and the respective DNA can help to generate engineered zinc fingers for therapeutic purposes involving genome targeting. Exploring the structure-function relationships of the existing zinc finger-DNA complexes can aid in predicting the probable zinc fingers that could bind to any target DNA. Computational tools ease the prediction of such engineered zinc fingers by effectively utilizing information from the available experimental data. A study of literature reveals many approaches for predicting DNA-binding specificity in zinc finger proteins. However, an alternative approach that looks into the physico-chemical properties of these complexes would do away with the difficulties of designing unbiased zinc fingers with the desired affinity and specificity. We present a physico-chemical approach that exploits the relative strengths of hydrogen bonding between the target DNA and all combinatorially possible zinc fingers to select the most optimum zinc finger protein candidate.
authors: Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi 110 016, India.
authors: Sumedha
authors: S
authors: Roy
authors: Shayoni
authors: S
authors: Dutta
authors: Kanika
authors: K
authors: Khanna
authors: Shruti
authors: S
authors: Singla
authors: Durai
authors: D
authors: Sundar
mesh_terms: D000818:Animals; D001483:Base Sequence; D003198:Computer Simulation; D004247:DNA / Q000737:chemistry*; D004268:DNA-Binding Proteins / Q000737:chemistry*; D006801:Humans; D006860:Hydrogen Bonding; D008390:Markov Chains; D008958:Models, Molecular; D009862:Online Systems; D011485:Protein Binding; D015202:Protein Engineering; D012984:Software; D060388:Support Vector Machine; D016335:Zinc Fingers
chemical_list: D004268:DNA-Binding Proteins; D004247:DNA