Protein
Cysteine desulfurase 1
Organism
Anabaena variabilis (strain ATCC 29413 / PCC 7937)
Function
Catalyzes the removal of elemental sulfur atoms from cysteine to produce alanine. Seems to participate in the biosynthesis of the nitrogenase metalloclusters by providing the inorganic sulfur required for the Fe-S core formation.
Similarity
Belongs to the class-V pyridoxal-phosphate-dependent aminotransferase family. NifS/IscS subfamily.
Sequence
MSVIYLDNNATTKVDPEVVEAIMPYLTDYYGNPSSMHTFGGQLGKAVRTAREQVAALLGADESEIVFTSCGTEGDNAAIRAALLAQPEKRHIITTQVEHPAVLNVCKQLETQGYTVTYLSVNGHGQLDLDELEASLTGNTALVTIMYANNETGTVFPIEEIGKRVKERGAIFHVDAVQAVGKIPLNMKTSTIDMLTISGHKIHAPKGIGALYVRRGVRFRPLLIGGHQERGRRAGTENVPGIVGLGKAAELELIHIETAIKKETRLRDRLEQTLLAKIPDCEVNGDVTQRLPNTTNIGFKYIEGEAILLSLNKYGICASSGSACTSGSLEPSHVLRAMGLPYTTLHGSIRFSLCRYTTEAQIDRVIEVMPEIVERLRALSPFKNDEAGWLQAQEQTLAHR