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Which of the following is untrue regarding PSIPRED?(a) It is a web-based program that predicts protein secondary structures(b) It uses a combination of evolutionary information and neural networks(c) It uses a combination of evolutionary information only(d) The multiple sequence alignment is derived from a PSI-BLAST database searchI have been asked this question in an online interview.Question is from Coiled Coil Prediction in division Secondary Structure Prediction of Bioinformatics

Answer»

Correct choice is (C) It uses a combination of EVOLUTIONARY information only

To elaborate: A profile is extracted from the multiple sequence alignment generated from three rounds of automated PSI-BLAST. The profile is then used as input for a NEURAL NETWORK prediction similar to that in PHD, but without the jury layer. To achieve higher accuracy, a unique filtering algorithm is implemented to filter out unrelated PSI-BLAST hits during profile construction.



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