>cd04169 RF3 RF3 subfamily. Peptide chain release factor 3 (RF3) is a protein involved in the termination step of translation in bacteria. Termination occurs when class I release factors (RF1 or RF2) recognize the stop codon at the A-site of the ribosome and activate the release of the nascent polypeptide. The class II release factor RF3 then initiates the release of the class I RF from the ribosome. RF3 binds to the RF/ribosome complex in the inactive (GDP-bound) state. GDP/GTP exchange occurs, followed by the release of the class I RF. Subsequent hydrolysis of GTP to GDP triggers the release of RF3 from the ribosome. RF3 also enhances the efficiency of class I RFs at less preferred stop codons and at stop codons in weak contexts.

Probab=95.87 E-value=0.056 Score=33.08 Aligned_cols=89 Identities=19% Similarity=0.241 Sum_probs=50.4 Q ss_pred EEEEEECCCCCHHHHHHHHHCCCCCCCCCCCCCCCCCCEEEEE--------CCCH---HHHHHHHH---CCCCEEEEEEE Q ss_conf 4867528887888999987404898736668674488337997--------6855---58777642---18650233579 Q gi|254780226|r 4 KCGIIGLPNVGKSTLFNALTRTASAQAANYPFCTIEPNSGEVA--------VPDP---RMHKLAEI---AESKDLVPTRM 69 (367) Q Consensus 4 kiGlvG~pn~GKST~f~alT~~~~~~~~~ypFtTi~pn~g~~~--------v~d~---~~~~l~~~---~~~~~~~p~~i 69 (367) T Consensus 4 niai~gH~gaGKTtL~EalL~~~G-~i~---------r~G~V~~~~~~g~t~~D~~~eE~~R~iSi~~~~~~~~w~~~ki 73 (267) T cd04169 4 TFAIISHPDAGKTTLTEKLLLFGG-AIR---------EAGAVKARKSRKHATSDWMEIEKQRGISVTSSVMQFEYRDCVI 73 (267) T ss_pred EEEEECCCCCCHHHHHHHHHHHCC-CCC---------CCCEEEECCCCCCCCCCCHHHHHHCCCEEECCEEEEEECCEEE T ss_conf 799984799998999999998668-633---------3854630368886046887999865944863637887899899 Q ss_pred EEEECCCCCCCCCCCCCCHHHHHHHHHCCCEEEEEECCCC Q ss_conf 9985122354322246632899998730374788501234 Q gi|254780226|r 70 SFVDIAGLVRGASKGEGLGNQFLAHIREVDAIIHVLRCFK 109 (367) Q Consensus 70 ~~iDvaGLv~gA~~G~GlGN~FL~~ir~aDalihVVdaf~ 109 (367) T Consensus 74 nliDTPG~~DF~-------~e~~~al~v~D~AviVv~a~~ 106 (267) T cd04169 74 NLLDTPGHEDFS-------EDTYRTLTAVDSAVMVIDAAK 106 (267) T ss_pred EEEECCCCHHHH-------HHHHHHHHHHHCEEEEEECCC T ss_conf 999796977899-------999999988645479952566

HHsearch alignment for GI: 254780226 and conserved domain: cd04169