>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=99.73 E-value=1.2e-15 Score=117.69 Aligned_cols=321 Identities=18% Similarity=0.233 Sum_probs=208.0 Q ss_pred CCC-CEEEECCCCCCCCCCCCH-HHHHHHHHHHHHHC-----CCCCCCCCCCCCCCHHHHHHHHHHHHHCCCC--CEEEE Q ss_conf 289-768980344656677988-99999999998637-----8688722443688589999999984012888--51674 Q gi|254780486|r 26 LRR-QDIWDFTSHDYLALSSST-LLREKILSSLDSKI-----PIGSGGSRLLCGNYNQHLELEEEAADFFGFE--KMLYF 96 (381) Q Consensus 26 ~~~-~~~l~f~s~dYLGl~~~p-~v~~a~~~a~~~~~-----g~~~~~sr~~~G~~~~~~~lE~~lA~~~g~e--~al~~ 96 (381) T Consensus 14 ~~Gg~pLvYLDs---AAT~QKP~~Vida~~~yY~~~nANVHRG~H~Ls~~----AT~~YE~~R~kva~FiNA~~~~EIvF 86 (409) T TIGR01979 14 VNGGKPLVYLDS---AATSQKPQAVIDAVEEYYRKSNANVHRGIHTLSVR----ATEAYEEAREKVAKFINAASAEEIVF 86 (409) T ss_pred CCCCCCEEEECC---CCCCCCCHHHHHHHHHHHHHHCCCCCHHHHHHHHH----HHHHHHHHHHHHHHHHCCCCCCCEEE T ss_conf 679984177348---51002847799999999875167001689999999----99999999999998508899854787 Q ss_pred CCCCHH--HHHHHH---HHCCC----CCCCCHHHHCCHH-H--H-HHHHHCCCCCEEECCC-----CHHHHHHHHHHHHH Q ss_conf 166024--565566---63168----9710045420267-7--5-2666408764030568-----81478997643100 Q gi|254780486|r 97 GSGYAA--NMAILS---TLPQA----TDLIVYDKLVHAS-I--R-EGINSGKAQAIAIPHN-----NINSFAENINKWRK 158 (381) Q Consensus 97 ~sG~~A--n~~~i~---~l~~~----~d~ii~D~~~HaS-i--~-~g~~ls~a~~~~f~Hn-----D~~~Le~~l~~~~~ 158 (381) T Consensus 87 T~gtTe~iNLvA~s~g~~~l~~av~pGDeIv~s~mEHHaNiVPWQ~l~~r~GA~lk~~~l~~~G~ld~~~l~~~~~~~-- 164 (409) T TIGR01979 87 TRGTTESINLVAYSWGRSRLKAAVDPGDEIVISEMEHHANIVPWQLLAERTGATLKFIPLDDDGTLDLDDLEELLTEK-- 164 (409) T ss_pred ECCCCHHHHHHHHHHCCCCCHHHCCCCCEEEECCHHHHCCHHHHHHHHHHHCCEEEEEECCCCCEEEHHHHHHHHHCC-- T ss_conf 076027889999983110134253898879840111001214799999760987899744887605188899883269-- Q ss_pred CCCCCCCEEEECCCCCCCCCHHHHHHHHHHHHHCCEEEEECCCCCCCCCCCCCCEEEEEHHCC--CCCCCCCCCCCCCCC Q ss_conf 024786079714621576613468999998631360898613112223477764011000013--465210013465653 Q gi|254780486|r 159 SGGKGFPWIVVESIYSMDGDKAPLDDLVKIANDYDGFIVVDEAHATGVCGPLGKGLTHIIEER--NNVIVMHSCSKALGS 236 (381) Q Consensus 159 ~~~~~~~~vv~egv~Sm~G~~apL~~i~~l~~~y~~~LivDEah~~Gv~G~~G~G~~~~~~~~--~~~iv~~TlsKa~g~ 236 (381) T Consensus 165 -----TKlVa~~HvSNVlGtvnP~~ei~~~AH~~GA~vlvDGAQ~~p----H~-----pvDv~~ldcDFyvFSGHKmyGP 230 (409) T TIGR01979 165 -----TKLVAITHVSNVLGTVNPVEEIIKLAHQVGAKVLVDGAQAVP----HM-----PVDVQALDCDFYVFSGHKMYGP 230 (409) T ss_pred -----CEEEEEEEEECCCCCCCCHHHHHHHHHHCCCEEEEECCCCCC----CC-----CCCHHHHCCCEEEEECCHHHCC T ss_conf -----829999742022030148789999986579769986255758----98-----9885655787445610045257 Q ss_pred EE-EEEECCCCCCCCCCCCCCCEE----------------CCC------CCCCCH--HHHHHHHHHHHHHC--CCHHHHH Q ss_conf 02-675245100100001211000----------------013------577502--57898878988627--1022478 Q gi|254780486|r 237 SG-ALVGSNKIIYDYLINYAKPFI----------------YTT------SPSPIL--AVVACEALKLIKRK--PALHKSL 289 (381) Q Consensus 237 ~G-G~i~~~~~ii~~l~~~~~~~i----------------fst------~l~P~~--~aaa~aal~~l~~~--~~~~~~l 289 (381) T Consensus 231 tGiGVLYGK~~lLe~M----PPf~gGG~MI~~V~~~~g~ty~~~P~KFEAGTPniagviGLgaAidYl~~iG~~~I~~~E 306 (409) T TIGR01979 231 TGIGVLYGKEELLEEM----PPFLGGGEMIEEVSLEEGTTYNEAPHKFEAGTPNIAGVIGLGAAIDYLEKIGLEKIEAHE 306 (409) T ss_pred CCCEEEHHHHHHHHHC----CCCCCCCCEEEEEEECCCCEECCCCCCCCCCCCCHHHHHHHHHHHHHHHHCCHHHHHHHH T ss_conf 6630112788988647----784669861578880577113678754568883589999999999998523878999999 Q ss_pred HHHHHHHHHHHHCCCCC----C----CCCCEEEEEECCHHHHHHHHHHHHHCCEEEEEE--------CCCCCCCCCCEEE Q ss_conf 99999999876417978----9----989728999589799999999999779189862--------2888888870399 Q gi|254780486|r 290 LQLINITDKIANKKIGF----S----SQSHIQSIVIGDNKSCLNIAKNLQKKGFDIRAI--------RPPTVPINTARLR 353 (381) Q Consensus 290 ~~~~~~~~~~~~~~~g~----~----~~s~I~~v~~gd~~~a~~~~~~L~~~Gi~v~~i--------~~PtVp~~~~rlR 353 (381) T Consensus 307 ~~L~~yal~~L~~ipg~~iyGP~~~~~R~g~isFn~~g-~HpHDVg~~LD~~GiAvR~GHHCAqPlm~~~~v---~atcR 382 (409) T TIGR01979 307 KELTAYALERLGEIPGLRIYGPRDAEDRGGIISFNVEG-VHPHDVGTILDEEGIAVRSGHHCAQPLMRRFGV---PATCR 382 (409) T ss_pred HHHHHHHHHHHHCCCCEEEECCCCCCCCCCEEEECCCC-CCCCHHHHHCCCCCCEEEECCHHHHHHHHHCCC---CEEEE T ss_conf 99999999996018985874687743264333302588-870022301226775686170532489865599---63678 Q ss_pred EECCCCCCHHHHHHHHHHHHHHHH Q ss_conf 962878999999999999999988 Q gi|254780486|r 354 ISITLNVDEPTIVKLFDILPQIIS 377 (381) Q Consensus 354 i~v~a~~t~edi~~~~~~l~~v~~ 377 (381) T Consensus 383 ASf~~YNT~ediD~Lv~aL~~v~~ 406 (409) T TIGR01979 383 ASFYLYNTEEDIDALVEALKKVRK 406 (409) T ss_pred EEEEECCCHHHHHHHHHHHHHHHH T ss_conf 874103898999999999999998

HHsearch alignment for GI: 254780486 and conserved domain: TIGR01979