>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=99.94 E-value=1.4e-27 Score=188.04 Aligned_cols=329 Identities=21% Similarity=0.280 Sum_probs=227.9 Q ss_pred CC-CCEEECCCCCCCCCCCHHHHHHHHHHHHCC---CCC--CC----CCCCCHHHHHHHHHHHHHHCCCCCCCCCCCCCC Q ss_conf 69-972665658974988999999999998388---756--99----877898999999998642101333322332334 Q gi|254780602|r 29 KG-IDVLCLTAGEPDFDMPENVKYAVVRAMERG---ETK--YT----AVAGISPLREAIVEKFRRDNDLHYTSDQIIVGT 98 (400) Q Consensus 29 ~g-~~ii~l~~G~p~~~~p~~i~~a~~~al~~~---~~~--Y~----~~~G~~~lR~aia~~~~~~~g~~~~~e~I~it~ 98 (400) T Consensus 15 ~Gg~pLvYLDsAAT~-QKP~~Vida~~~yY~~~nANVHRG~H~Ls~~AT~~YE~~R~kva~FiNA~-----~~~EIvFT~ 88 (409) T TIGR01979 15 NGGKPLVYLDSAATS-QKPQAVIDAVEEYYRKSNANVHRGIHTLSVRATEAYEEAREKVAKFINAA-----SAEEIVFTR 88 (409) T ss_pred CCCCCEEEECCCCCC-CCCHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHCCC-----CCCCEEEEC T ss_conf 799841773485100-28477999999998751670016899999999999999999999850889-----985478707 Q ss_pred CCCCCCCCCCCCC----CCC----CCCCCCCCC----CCCCCCCCCCCCCCCCCCCCCCCCCCCCCHHHHHHCCCCCCCC Q ss_conf 5433332222222----332----232222333----3232222222222222222222223222103331000122122 Q gi|254780602|r 99 GAKHVIFNALMAT----VNM----GDEVLIPRP----YWVSYPDMVALCGGIPVFVDTQQDDNFQVSPEKLEQAITPKTK 166 (400) Q Consensus 99 G~~~~l~~~~~~~----~~~----Gd~Vlv~~P----~y~~y~~~~~~~g~~~~~v~~~~~~~~~~d~~~l~~~i~~~~k 166 (400) T Consensus 89 gtTe~iNLvA~s~g~~~l~~av~pGDeIv~s~mEHHaNiVPWQ~l~~r~GA~lk~~~l~~~G--~ld~~~l~~~~~~~TK 166 (409) T TIGR01979 89 GTTESINLVAYSWGRSRLKAAVDPGDEIVISEMEHHANIVPWQLLAERTGATLKFIPLDDDG--TLDLDDLEELLTEKTK 166 (409) T ss_pred CCCHHHHHHHHHHCCCCCHHHCCCCCEEEECCHHHHCCHHHHHHHHHHHCCEEEEEECCCCC--EEEHHHHHHHHHCCCE T ss_conf 60278899999831101342538988798401110012147999997609878997448876--0518889988326982 Q ss_pred CEEECCCCCCCCCCCCCCCCCCCCCCCCCCCCCEEECCCCCCCCCCCCCCCCCCCCCCCCCCCEEEEECCCCCCCCCCCC Q ss_conf 01211354210000123333211122333332011101221100000122332221112333225741465443223445 Q gi|254780602|r 167 WLFLNSPSNPSGVVYSQNRLRALADVLVRNPHVHIISDDIYEHIVYRNCQFSNIVNVEPSLYERTLVVNGVSKAYAMTGL 246 (400) Q Consensus 167 ~i~l~nP~NPTG~v~s~~~l~~i~~~~a~~~~i~ii~De~Y~~l~~~~~~~~s~~~~~~~~~~~~i~~~S~SK~~~~~G~ 246 (400) T Consensus 167 lVa~~HvSNVlGtvnP~~ei~---~~-AH~~GA~vlvDGAQ------~~pH~pv---Dv~~ldcDFyvFSGHKmyGPtG- 232 (409) T TIGR01979 167 LVAITHVSNVLGTVNPVEEII---KL-AHQVGAKVLVDGAQ------AVPHMPV---DVQALDCDFYVFSGHKMYGPTG- 232 (409) T ss_pred EEEEEEEECCCCCCCCHHHHH---HH-HHHCCCEEEEECCC------CCCCCCC---CHHHHCCCEEEEECCHHHCCCC- T ss_conf 999974202203014878999---99-86579769986255------7589898---8565578744561004525766- Q ss_pred CCCCCCCHHHHHHHHHHHC-----------CC-CCC---------CCCCCCCCC----CCCCCCCCCCCCCCCCCCCCCC Q ss_conf 4442211012268753100-----------12-223---------322222222----2222346764322222211000 Q gi|254780602|r 247 RIGYAAGALSLIKSMIVLQ-----------GQ-QTS---------GACSIAQWA----AVEALNGPQDFVVNNRKIFEYR 301 (400) Q Consensus 247 RiG~~v~~~~li~~l~~~~-----------~~-~~~---------~~~~~~q~a----~~~~l~~~~~~~~~~~~~~~~~ 301 (400) T Consensus 233 -iGVLYGK~~lLe~MPPf~gGG~MI~~V~~~~g~ty~~~P~KFEAGTPniagviGLgaAidYl~~--iG~~~I~~~E~~L 309 (409) T TIGR01979 233 -IGVLYGKEELLEEMPPFLGGGEMIEEVSLEEGTTYNEAPHKFEAGTPNIAGVIGLGAAIDYLEK--IGLEKIEAHEKEL 309 (409) T ss_pred -CEEEHHHHHHHHHCCCCCCCCCEEEEEEECCCCEECCCCCCCCCCCCCHHHHHHHHHHHHHHHH--CCHHHHHHHHHHH T ss_conf -3011278898864778466986157888057711367875456888358999999999999852--3878999999999 Q ss_pred CCCHHHHHHCCCCCEEEECC-----CCEEEEEECCCCCCCCCCCCCCCCCHHHHHHHHHHHCCEEEECCCC--------C Q ss_conf 00002455304776033027-----4089986264102332113322489899999999873979983502--------2 Q gi|254780602|r 302 RDLCVAQLQGVPGIRYMIPD-----GAFYLYPSCQDLIGKKSPSGDVIRTDLDFVNGLLEIEKVAVVQGSS--------F 368 (400) Q Consensus 302 r~~~~~~L~~~~g~~~~~p~-----g~~y~~~~~~~~~~~~~~~~~~~~~~~~~~~~Ll~~~gV~v~pG~~--------F 368 (400) T Consensus 310 ~~yal~~L~~ipg~~iyGP~~~~~R~g~-isFn~~g------------~HpHDV-g~~LD~~GiAvR~GHHCAqPlm~~~ 375 (409) T TIGR01979 310 TAYALERLGEIPGLRIYGPRDAEDRGGI-ISFNVEG------------VHPHDV-GTILDEEGIAVRSGHHCAQPLMRRF 375 (409) T ss_pred HHHHHHHHHCCCCEEEECCCCCCCCCCE-EEECCCC------------CCCCHH-HHHCCCCCCEEEECCHHHHHHHHHC T ss_conf 9999999601898587468774326433-3302588------------870022-3012267756861705324898655 Q ss_pred CCCCEEEEEEE--CCH---HHHHHHHHHHHHHH Q ss_conf 89972899962--999---99999999999999 Q gi|254780602|r 369 GHGPSIRISYA--VSD---AILEEACVRIKRFC 396 (400) Q Consensus 369 g~~~~iRis~~--~~~---e~l~~al~rl~~~l 396 (400) T Consensus 376 ~v~atcRASf~~YNT~ediD~Lv~aL~~v~~~F 408 (409) T TIGR01979 376 GVPATCRASFYLYNTEEDIDALVEALKKVRKFF 408 (409) T ss_pred CCCEEEEEEEEECCCHHHHHHHHHHHHHHHHHH T ss_conf 996367887410389899999999999999860

HHsearch alignment for GI: 254780602 and conserved domain: TIGR01979