General overview on structure prediction of twilight-zone proteins

Theoretical Biology & Medical Modelling
Bee Yin KhorYee Siew Choong

Abstract

Protein structure prediction from amino acid sequence has been one of the most challenging aspects in computational structural biology despite significant progress in recent years showed by critical assessment of protein structure prediction (CASP) experiments. When experimentally determined structures are unavailable, the predictive structures may serve as starting points to study a protein. If the target protein consists of homologous region, high-resolution (typically <1.5 Å) model can be built via comparative modelling. However, when confronted with low sequence similarity of the target protein (also known as twilight-zone protein, sequence identity with available templates is less than 30%), the protein structure prediction has to be initiated from scratch. Traditionally, twilight-zone proteins can be predicted via threading or ab initio method. Based on the current trend, combination of different methods brings an improved success in the prediction of twilight-zone proteins. In this mini review, the methods, progresses and challenges for the prediction of twilight-zone proteins were discussed.

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Sep 2, 2016·Journal of Biomolecular Structure & Dynamics·Marco FranzoiStefano Mammi
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Methods Mentioned

BETA
X-ray
nuclear magnetic resonance
NMR

Software Mentioned

SVMSEQ
BLAST
LiveBench
3D
MUSTER Multi - Source ThreadER
Rosetta
LOMETS
MUSTER
TASSER
Robetta

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