>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=98.68 E-value=1.1e-06 Score=64.04 Aligned_cols=341 Identities=18% Similarity=0.184 Sum_probs=186.3 Q ss_pred CCCCEEEEEECC-CEEEECCCCEEEECHHHHHHHCCCCCCHHHHHHHHHHHHH-CCCCCCCCCCHHH----HHH---HHH Q ss_conf 888748985010-3799679976464102267435787899999999999973-1450687578189----999---986 Q gi|254780432|r 12 DQSDIRFEKGKG-AWLFSENGIPFLDFASGIAVNSLGHSHPELVAILKSQSEK-LWHVSNLYQSTQQ----EIF---ANH 82 (392) Q Consensus 12 ~~~p~~i~~a~G-~~i~d~dG~~yiD~~~g~~~~~lGh~~p~i~~a~~~q~~~-~~~~~~~~~~~~~----~~l---a~~ 82 (392) T Consensus 5 ~DFPiL~~~~~Gg~pLv------YLD--sAAT~----QKP~~Vida~~~yY~~~nANVHRG~-H~Ls~~AT~~YE~~R~k 71 (409) T TIGR01979 5 EDFPILKRKVNGGKPLV------YLD--SAATS----QKPQAVIDAVEEYYRKSNANVHRGI-HTLSVRATEAYEEAREK 71 (409) T ss_pred CCCCHHCCCCCCCCCEE------EEC--CCCCC----CCCHHHHHHHHHHHHHHCCCCCHHH-HHHHHHHHHHHHHHHHH T ss_conf 11774305467998417------734--85100----2847799999999875167001689-99999999999999999 Q ss_pred HHHHCC---CCCCCCCCCCCCCHH-HHHHHHHHHHHCC-CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC Q ss_conf 520101---333123565554035-6777665432001-34786002343546565432123455321134799986433 Q gi|254780432|r 83 LIHSTF---ADRVFFTNSGAESVE-CAIKTARRYHYMA-GKTNKFRIVTFEGAFHGRTLATISAGGKLQYLEGFGPKIEG 157 (392) Q Consensus 83 L~~~~~---~~~v~f~~SGseA~e-~Aiklar~~~~~~-g~t~r~~ii~~~~~yHG~t~~a~s~s~~~~~~~~~~p~~~~ 157 (392) T Consensus 72 va~FiNA~~~~EIvFT~gtTe~iNLvA~s~g~~~-l~~av~pGDeIv~s~mE-HHa-NiVPWQ~l---~~r~GA~lk~~~ 145 (409) T TIGR01979 72 VAKFINAASAEEIVFTRGTTESINLVAYSWGRSR-LKAAVDPGDEIVISEME-HHA-NIVPWQLL---AERTGATLKFIP 145 (409) T ss_pred HHHHHCCCCCCCEEEECCCCHHHHHHHHHHCCCC-CHHHCCCCCEEEECCHH-HHC-CHHHHHHH---HHHHCCEEEEEE T ss_conf 9985088998547870760278899999831101-34253898879840111-001-21479999---976098789974 Q ss_pred CCCCCCHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHCCCCCCCCEEEECCCCCCCCCCCCCCCCCCCCC- Q ss_conf 3222100268875410123322223332222112462101232211022345721310110034444555310111245- Q gi|254780432|r 158 FDQAKFCDLQSLKNQISNDTAAILIEPIQGEGGVRKVPEEFLQQLRKICDDIDALLIFDEVQTGYGRTGKLFAYEWANV- 236 (392) Q Consensus 158 ~~~~~~~d~~~l~~~~~~~iAavi~Epv~g~~G~~~~~~~~l~~l~~lc~~~g~llI~DEV~tG~GRtG~~f~~e~~gi- 236 (392) T Consensus 146 l~~~G~ld~~~l~~~~~~~TKlVa~~HvSNVlGtvnP----~~ei~~~AH~~GA~vlvDGAQ~~p--------H~pvDv~ 213 (409) T TIGR01979 146 LDDDGTLDLDDLEELLTEKTKLVAITHVSNVLGTVNP----VEEIIKLAHQVGAKVLVDGAQAVP--------HMPVDVQ 213 (409) T ss_pred CCCCCEEEHHHHHHHHHCCCEEEEEEEEECCCCCCCC----HHHHHHHHHHCCCEEEEECCCCCC--------CCCCCHH T ss_conf 4887605188899883269829999742022030148----789999986579769986255758--------9898856 Q ss_pred --CCCEEECC--CCCCCCCC--CCCCCCCCCCCCCCCCCC-----------CC-CCCCCCC-------------CCHHHH Q ss_conf --45302103--44444434--432100011122222332-----------23-4532111-------------100123 Q gi|254780432|r 237 --KPDIMTIA--KGMGGGFP--IGACLATNEVAACMNQGS-----------HG-STYGGNV-------------LAMVLG 285 (392) Q Consensus 237 --~PDi~~~g--K~l~gG~P--~sav~~~~~i~~~~~~~~-----------~~-~T~~gnp-------------l~~aaa 285 (392) T Consensus 214 ~ldcDFyvFSGHKmyG---PtGiGVLYGK~~lLe~MPPf~gGG~MI~~V~~~~g~ty~~~P~KFEAGTPniagviGLgaA 290 (409) T TIGR01979 214 ALDCDFYVFSGHKMYG---PTGIGVLYGKEELLEEMPPFLGGGEMIEEVSLEEGTTYNEAPHKFEAGTPNIAGVIGLGAA 290 (409) T ss_pred HHCCCEEEEECCHHHC---CCCCEEEHHHHHHHHHCCCCCCCCCEEEEEEECCCCEECCCCCCCCCCCCCHHHHHHHHHH T ss_conf 5578744561004525---7663011278898864778466986157888057711367875456888358999999999 Q ss_pred HHHHHHHHCCCCCCHHHHHCCHHHHHHHHHHHHCCCE--EE--EECCCEEEEEEEECCC-HHHHHHHHHHCCEEEEECCC Q ss_conf 3455432012221011210000268899998867970--75--5046400999872499-89999999968989962689 Q gi|254780432|r 286 EKVLNIIQSDGFLENVINIAKILFEGLTAIKNRFPNM--FL--EVRGQGLLIGLKTVFS-PALLAAKFRDECLLTAPSSD 360 (392) Q Consensus 286 ~a~L~~l~~~~l~~~~~~~g~~l~~~L~~l~~~~~~~--v~--~vRG~Gl~~~ie~~~~-~~~~~~~l~~~Gll~~~~~~ 360 (392) T Consensus 291 idYl~~iG~~~I~~~E~~L~~yal~~L~~i----pg~~iyGP~~~~~R~g~isFn~~g~HpHDVg~~LD~~GiAvR~GHH 366 (409) T TIGR01979 291 IDYLEKIGLEKIEAHEKELTAYALERLGEI----PGLRIYGPRDAEDRGGIISFNVEGVHPHDVGTILDEEGIAVRSGHH 366 (409) T ss_pred HHHHHHCCHHHHHHHHHHHHHHHHHHHHCC----CCEEEECCCCCCCCCCEEEECCCCCCCCHHHHHCCCCCCEEEECCH T ss_conf 999852387899999999999999996018----9858746877432643333025888700223012267756861705 Q ss_pred ------------CEEEECCCCCCCHHHHHHHHHHHHHHHHHH Q ss_conf ------------889955898688999999999999999985 Q gi|254780432|r 361 ------------NVVRILPPLTITAEEIHEGLERIERTAIKL 390 (392) Q Consensus 361 ------------~~irl~Ppl~it~~eid~~i~~l~~al~~L 390 (392) T Consensus 367 CAqPlm~~~~v~atcRASf~~YNT~ediD~Lv~aL~~v~~~F 408 (409) T TIGR01979 367 CAQPLMRRFGVPATCRASFYLYNTEEDIDALVEALKKVRKFF 408 (409) T ss_pred HHHHHHHHCCCCEEEEEEEEECCCHHHHHHHHHHHHHHHHHH T ss_conf 324898655996367887410389899999999999999860

HHsearch alignment for GI: 254780432 and conserved domain: TIGR01979