>TIGR01979 sufS cysteine desulfurases, SufS subfamily; InterPro: IPR010970 Cysteine desulphurases are pyridoxal-phosphate enzymes which catalyse the removal of sulphur from L-cysteine to form L-alanine and elemental sulphur. These enzymes have been shown to play an important role in the biosynthesis of iron-sulphur clusters, thionucleosides in tRNA, thiamine, biotin, lipoate and molydopterin This entry represents a subfamily of NifS-related cysteine desulphurases that are often involved in iron-sulphur cluster formation, which is needed for nitrogen fixation and other vital functions . Many of these enzymes, in addition to cysteine desulphurase activity, also show selenocysteine lyase activity where L-selenocysteine is converted to L-alanine and selenide . Some of these enzymes are much more specific for selenocysteine than cysteine and are thus believed to function in selenium metabolism rather than sulphur metabolism. Structural studies of the E. coli and Synechocystis enzymes indicate that they are homodimers which show a similar fold to other members of the alpha family of pyridoxal-phosphate enzymes .; GO: 0030170 pyridoxal phosphate binding, 0031071 cysteine desulfurase activity, 0006534 cysteine metabolic process.

Probab=98.61 E-value=2.7e-06 Score=62.64 Aligned_cols=333 Identities=16% Similarity=0.192 Sum_probs=189.0 Q ss_pred CCC-CE--EEECHHHHHHHCCCCCCHHHHHHHHHHHHHHCCHHCCCCCCHHHHHHH-------HHHHHHCCC-CCCCEEE Q ss_conf 898-76--464102377536787899999999999985220102456897899999-------999972037-8641110 Q gi|254780488|r 37 ENH-DK--IIDAISSWWVITHGHRHPIIMNAIRSASENYDQIIFSEYTHEPAEQLA-------RLLIKIAPL-GLQYVFF 105 (423) Q Consensus 37 ~dG-~~--~lD~~~g~~~~~lGh~~~~i~~a~~~q~~~~~~~~~~~~~~~~~~~la-------~~l~~~~p~-~~~~v~f 105 (423) T Consensus 14 ~~Gg~pLvYLDs--AAT~----QKP~~Vida~~~yY~~~nA-NVHRG~H~Ls~~AT~~YE~~R~kva~FiNA~~~~EIvF 86 (409) T TIGR01979 14 VNGGKPLVYLDS--AATS----QKPQAVIDAVEEYYRKSNA-NVHRGIHTLSVRATEAYEEAREKVAKFINAASAEEIVF 86 (409) T ss_pred CCCCCCEEEECC--CCCC----CCCHHHHHHHHHHHHHHCC-CCCHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCEEE T ss_conf 679984177348--5100----2847799999999875167-00168999999999999999999998508899854787 Q ss_pred CCCCCCHHH-HHHHHHHHCCCCCCC-CCCEEEEEECCCCCCCCCCCCCCCCCCCCCCCCCC-------CCCCCCEECCCC Q ss_conf 265420256-777764300133443-32113432025665321123432233333322234-------454210001222 Q gi|254780488|r 106 SDSGSTSIE-VALKMALGFFNNNNM-PRNKIVVMEHGYHGDTIGSMSVSMRGAFNNSYEPL-------LFDVETIPFPHH 176 (423) Q Consensus 106 ~~SGsEA~e-~Alklar~~~~~~~~-~r~~ii~~~~~yHG~t~~a~s~s~~~~~~~~~~p~-------~~~~~~i~~~~~ 176 (423) T Consensus 87 T~gtTe~iNLvA~s~g~~~l~~av~pGDeIv~s~-----------------mEHHaNiVPWQ~l~~r~GA~lk~~~l~~- 148 (409) T TIGR01979 87 TRGTTESINLVAYSWGRSRLKAAVDPGDEIVISE-----------------MEHHANIVPWQLLAERTGATLKFIPLDD- 148 (409) T ss_pred ECCCCHHHHHHHHHHCCCCCHHHCCCCCEEEECC-----------------HHHHCCHHHHHHHHHHHCCEEEEEECCC- T ss_conf 0760278899999831101342538988798401-----------------1100121479999976098789974488- Q ss_pred CCCCCCCCHHHHHCCC-CCEEEEECCCCCCCCCCCCCCCCCCCCEEECCCCCCCCEECCCCCCCCCCCCCCCCCCCCCCC Q ss_conf 2222111101221277-511343116554321122223332110011011123420001221244445554311223344 Q gi|254780488|r 177 NEEQKTLDDLEKHCST-QKIAAFLVEPLILGAGGMQTYRPYILKEFMRITKKYDTLLIADEVMTGWGRTGKIFACNHADI 255 (423) Q Consensus 177 ~~~~~~l~~l~~~~~~-~~iaavi~EP~i~~~gG~~~~~~~~l~~lr~lc~~~g~llI~DEV~tG~GRtG~~~a~~~~gi 255 (423) T Consensus 149 -~G~ld~~~l~~~~~~~TKlVa~~H---vSNVlGtvnP----~~ei~~~AH~~GA~vlvDGAQ~~p--------H~pvDv 212 (409) T TIGR01979 149 -DGTLDLDDLEELLTEKTKLVAITH---VSNVLGTVNP----VEEIIKLAHQVGAKVLVDGAQAVP--------HMPVDV 212 (409) T ss_pred -CCEEEHHHHHHHHHCCCEEEEEEE---EECCCCCCCC----HHHHHHHHHHCCCEEEEECCCCCC--------CCCCCH T ss_conf -760518889988326982999974---2022030148----789999986579769986255758--------989885 Q ss_pred ---CCCEEECCC----CCCCCCCCCCCCCCCHHHHHHHCCC---CC--CCCCCCC-CCCCCCC-------------CCHH Q ss_conf ---442020134----4332223444332240132100012---22--2222233-3332222-------------1001 Q gi|254780488|r 256 ---TPDILCLSK----GITGGALPLAATLCSEEIFDSHLSS---DK--KKTFFHS-SSYTANP-------------IACA 309 (423) Q Consensus 256 ---~PDi~~~gK----~l~gG~~pisav~~~~~i~~~~~~~---~~--~~~~~h~-~T~~gnp-------------l~~a 309 (423) T Consensus 213 ~~ldcDFyvFSGHKmyGPtG----iGVLYGK~~lLe~MPPf~gGG~MI~~V~~~~g~ty~~~P~KFEAGTPniagviGLg 288 (409) T TIGR01979 213 QALDCDFYVFSGHKMYGPTG----IGVLYGKEELLEEMPPFLGGGEMIEEVSLEEGTTYNEAPHKFEAGTPNIAGVIGLG 288 (409) T ss_pred HHHCCCEEEEECCHHHCCCC----CEEEHHHHHHHHHCCCCCCCCCEEEEEEECCCCEECCCCCCCCCCCCCHHHHHHHH T ss_conf 65578744561004525766----30112788988647784669861578880577113678754568883589999999 Q ss_pred HHHCCHHHCCCCCCCCCCCCHHHHHHHHHHHHHHC--CCEEEECCCCCEEEEEECCCCCCCCCHHHHHHHHHHHHCCEEE Q ss_conf 10000000001123322210026789899997518--9777774553399999706876664106899999999788599 Q gi|254780488|r 310 AALANLQIWEKEPVIERIKNLERMHADRLSLLKSN--KKFVNIRQMGTIVALDFNVQNKGYFFDKNAKLKNFFREKKILI 387 (423) Q Consensus 310 aa~a~L~~i~~~~l~~~~~~~g~~l~~~l~~L~~~--~~v~~vrG~Gl~~~iel~~~~~~~~~~~~~~l~~~l~~~Gil~ 387 (423) T Consensus 289 aAidYl~~iG~~~I~~~E~~L~~yal~~L~~ipg~~iyGP~~~~~R~g~isFn~~--g~Hp-----HDVg~~LD~~GiAv 361 (409) T TIGR01979 289 AAIDYLEKIGLEKIEAHEKELTAYALERLGEIPGLRIYGPRDAEDRGGIISFNVE--GVHP-----HDVGTILDEEGIAV 361 (409) T ss_pred HHHHHHHHCCHHHHHHHHHHHHHHHHHHHHCCCCEEEECCCCCCCCCCEEEECCC--CCCC-----CHHHHHCCCCCCEE T ss_conf 9999985238789999999999999999601898587468774326433330258--8870-----02230122677568 Q ss_pred EECCCE-------------EEECCCCCCCHHHHHHHHHHHHHHHHHH Q ss_conf 951998-------------9956898787999999999999999875 Q gi|254780488|r 388 RPLGHI-------------MYLMPPYCITATDLDHIYNTINEAVDFL 421 (423) Q Consensus 388 ~~~gn~-------------i~l~Ppl~it~~eId~~l~~l~~aL~~l 421 (423) T Consensus 362 R~GHHCAqPlm~~~~v~atcRASf~~YNT~ediD~Lv~aL~~v~~~F 408 (409) T TIGR01979 362 RSGHHCAQPLMRRFGVPATCRASFYLYNTEEDIDALVEALKKVRKFF 408 (409) T ss_pred EECCHHHHHHHHHCCCCEEEEEEEEECCCHHHHHHHHHHHHHHHHHH T ss_conf 61705324898655996367887410389899999999999999860

HHsearch alignment for GI: 254780488 and conserved domain: TIGR01979