340 likes | 424 Views
Structure prediction. TTCCPSIVARSNFNVCRLPGTPEAICATYTGCIIIPGATCPGDYAN. At present, there is still no method available that can consistently predict correct structure from a general sequence. Homology Modeling. If the sequence identity between two sequences A and B is greater than 25%,
E N D
Structure prediction TTCCPSIVARSNFNVCRLPGTPEAICATYTGCIIIPGATCPGDYAN At present, there is still no method available that can consistently predict correct structure from a general sequence NCKU
Homology Modeling If the sequence identity between two sequences A and B is greater than 25%, and if B has a known structure, then it is possible to predict the structure of the sequence A by homology modeling method. NCKU
For a raw sequence without a known structure MQQPMNYPCP QIFWVDSSAT SSWAPPGSVF PCPSCGPRGP DQRRPPPPPP PVSPLPPPSQ PLPLPPLTPL KKKDHNTNLW LPVVFFMVLV ALVGMGLGMY QLFHLQKELA ELREFTNQSL KVSSFEKQIA NPSTPSEKKE PRSVAHLTGN PHSRSIPLEW EDTYGTALIS GVKYKKGGLV INETGLYFVY SKVYFRGQSC NNQPLNHKVY MRNSKYPEDL VLMEEKRLNY CTTGQIWAHS SYLGAVFNLT SADHLYVNIS QLSLINFEES KTFFGLYKL Search for homologues in PDB by BLAST NCKU
Raw sequence Use templates to build the structure of the homologous sequence Predicted structure NCKU
Use SwissPDBViewer as an Example to build a structure of the following sequence MQQPMNYPCP QIFWVDSSAT SSWAPPGSVF PCPSCGPRGP DQRRPPPPPP PVSPLPPPSQ PLPLPPLTPL KKKDHNTNLW LPVVFFMVLV ALVGMGLGMY QLFHLQKELA ELREFTNQSL KVSSFEKQIA NPSTPSEKKE PRSVAHLTGN PHSRSIPLEW EDTYGTALIS GVKYKKGGLV INETGLYFVY SKVYFRGQSC NNQPLNHKVY MRNSKYPEDL VLMEEKRLNY CTTGQIWAHS SYLGAVFNLT SADHLYVNIS QLSLINFEES KTFFGLYKL NCKU
1TNRA DOGB NCKU
Before magic fit After magic fit NCKU
Structural Bioinformatics System Jenn-Kang Hwang Dept of Biological Science & Technology National Chiao-Tung University NCKU
Structural Bioinformatics System • Integration of structure database & other bio-databases • Structure analysis & Prediction • Dynamics & minimization • Molecular docking • Structure-sequence analysis • Integration of analysis tools NCKU
Dynamics & minimization Link to structure database Molecular visualization Molecular docking Structure Analysis & Prediction NCKU
VMD ABC NCKU
VMD+NAMD NCKU
VMD NCKU
NAMD NCKU
A sample Conf file NCKU