>sp|C6A4N4|RTCA_THESM RNA 3'-terminal phosphate cyclase OS=Thermococcus sibiricus GN=rtcA MRVIDGSYGEGGGQILRTAVALSVITGEPIKIINIRAKRSNPGLRPQHLHGILALKELSD AKVKGAKEGSTELEFYPKSTRVRHVKVLIKTAGSISLVLQALLPAMVFAEEEVTFEITGG TDVAWSPPVDYLKHITLYALEKLGIKVEIEIRRRGHYPRGGGFVIGKVYPWGTKRPLVAR TFDKIYSFEGISHAVRLPSHVAIRQAKAAKEALERVYPSIPIKIHEEYYEQGKDPHFGPG SGIVIWANTDVLRLGGDALGERGKPAEIVGREAAKALIEQLGPRHAVDKFLGDQLIPFLT FAGGDIWVSEVTKHLITNVWVVEQFFGRVFEMEGEIGKPGKVRVVKKVEL