>TIGR01745 asd_gamma aspartate-semialdehyde dehydrogenase; InterPro: IPR011534 Bacteria, plants and fungi metabolise aspartic acid to produce four amino acids - lysine, threonine, methionine and isoleucine - in a series of reactions known as the aspartate pathway. Additionally, several important metabolic intermediates are produced by these reactions, such as diaminopimelic acid, an essential component of bacterial cell wall biosynthesis, and dipicolinic acid, which is involved in sporulation in Gram-positive bacteria. Members of the animal kingdom do not posses this pathway and must therefore acquire these essential amino acids through their diet. Research into improving the metabolic flux through this pathway has the potential to increase the yield of the essential amino acids in important crops, thus improving their nutritional value. Additionally, since the enzymes are not present in animals, inhibitors of them are promising targets for the development of novel antibiotics and herbicides. For more information see . Aspartate-semialdehyde dehydrogenase, the second enzyme in the aspartate pathway, converts aspartyl phosphate to aspartate-semialdehyde, the branch point intermediate between the lysine and threonine/methionine pathways. Based on sequence alignments, the aspartate-semialdehyde dehydrogenase family appears to have two distinct subgroups, one found in most bacteria (Gram-positve and Gram-negative), while the other is found primarily in organisms lacking peptidoglycan (archaea,fungi and some bacteria). Most studies have been performed on enzymes isolated from Gram-negative bacteria , , , . The N-terminal domain forms the active site and NADP-binding pocket, while C-terminal domain is primarily involved in hydrophobic intersubunit contacts. The catalytic mechanism involves the formation of a covalent thioester acyl-enzyme intermediate mediated through nucleophilic attack by an active site cysteine residue on the substrate aspartyl phosphate. Release of inorganic phosphate is followed by hydride transfer from NADPH to yield the product. The recently described archaeal structure suggests that the two subgroups of aspartate semi-aldehyde dehydrogenase share similar structures and have an identical catalytic mechanism, despite their relatively low sequence identity . Unlike the bacterial enzymes, the archaeal enzyme utilised both NAD and NADP as cofactor. This entry represents aspartate-semialdehyde dehydrogenase from a variety of bacterial species.; GO: 0004073 aspartate-semialdehyde dehydrogenase activity, 0050661 NADP binding, 0009089 lysine biosynthetic process via diaminopimelate.

Probab=99.78 E-value=1.8e-19 Score=139.68 Aligned_cols=295 Identities=17% Similarity=0.164 Sum_probs=210.5 Q ss_pred CEEEEECCCCHHHHHHHHHHHCCCCEEE-E-EEECCCCCCCC---------------CCHHHHCCCCEEEECCCCHHHHH Q ss_conf 0799975886789999999862997289-9-99653007860---------------06677479989999389837899 Q gi|254780294|r 2 YKIFIDGEHGTTGLKIRSRIVQRKDLCL-L-SIPCEERHNLR---------------YREDLLNAADVSILCLPDVASLE 64 (311) Q Consensus 2 ~kVaIvGATG~vG~~li~lL~~hp~~~l-~-~l~s~~~ag~~---------------~~~~~~~~~Divf~a~p~~~s~~ 64 (311) T Consensus 1 ~~vGl~GWrGmvGsvl~~rm~ee~df~~i~~vffsts~~G~~~P~~~~~~~~~l~~a~~~~~lk~~d~i~tCqGG~yt~e 80 (367) T TIGR01745 1 KKVGLVGWRGMVGSVLLQRMQEEKDFDAIKPVFFSTSQLGQKAPSFAKTSANILEDAYDIDALKELDIIITCQGGDYTKE 80 (367) T ss_pred CCEEEEECCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCHHHHHHHHHHHHHHHHHCCEEEEECCCCCHHH T ss_conf 91134532036899999986523334444454220133155465300001567765655787742576787158740356 Q ss_pred HHHHHHHCCCCEEEECCCCCHHHHHHHHHCCCCCCHHHHHHCC--CCEEEECCCCCCCCCHHHHHHHHHHCCCCCCCCEE Q ss_conf 9999861258489822763035554311002100047765204--96077258421133112478888850345565026 Q gi|254780294|r 65 IIQLIKKNGINSRIIDTSTAHRIAPGWVYGFPEMDKSQKEKIR--SARYITNPGCYATGAIAILRPLRKAKLLPDRYPIT 142 (311) Q Consensus 65 ~~~~~~~~g~~~~vid~ss~~R~~~~vpl~vPEvN~~~~~~~~--~~~iIanPnC~~t~~~laL~PL~~~~~i~~~~~~~ 142 (311) T Consensus 81 iyP~lr~~GW~GyWidaas~lrm~~d~~i~ldPvn~~~i~d~~~~G~~~f~GGnCt~s~~lm~~GGlf~~~lv~W---~~ 157 (367) T TIGR01745 81 IYPKLRKAGWKGYWIDAASSLRMKDDAVIILDPVNLDVIKDAVNKGIRTFVGGNCTVSLLLMSLGGLFRDELVEW---VS 157 (367) T ss_pred HHHHHHHCCCCEEEEEHHHCCCCCCCCEEEECCHHHHHHHHHHHHCHHHHCCCHHHHHHHHHHHHHHHHHHHHHH---HH T ss_conf 317887266770353001000003661699752006889988850224421614898999886313557668888---88 Q ss_pred EEEECCCCCCCCCCCHHCCCCC---------------------------CCCCCCCCCCCCCCCCCCC------------ Q ss_conf 7651233335610000001344---------------------------4322343322222344444------------ Q gi|254780294|r 143 INAVSGYTGGGKKLISRMEQKN---------------------------MPDTISSNHFFYSLDLLHK------------ 183 (311) Q Consensus 143 ~~~~sg~sgaG~~~~~~~~~~~---------------------------~~~~~~~~~~~~~~~~~~~------------ 183 (311) T Consensus 158 ~~tyqaasG~Ga~hm~ell~~mG~~~~~v~~~l~~~~~~il~i~~kv~~~~r~~~~P~~~f~~Pla~~liPWid~~l~nG 237 (367) T TIGR01745 158 VATYQAASGGGARHMRELLKQMGVLYKEVEEELAKPSSAILEIERKVTKLIRSEELPVENFSVPLAGSLIPWIDKQLDNG 237 (367) T ss_pred HHHHHHCCCCCHHHHHHHHHHHHHHHHHHHHHHHCCHHHHHHHHHHHHHHHHHCCCCHHHCCCCHHHHHHHHHHHHHCCC T ss_conf 64432014420689999998631899988987521036766677677665420016600126651110001343231057 Q ss_pred -------CCCCHHHHCCCC--EEEEEEEECCCCCCEEEEEEEEEEECCCCCCCHHHHHHHHHHHHCCCCCCEEECCCCCC Q ss_conf -------342013321671--13688752034332027899998632577544899886654220014430560278788 Q gi|254780294|r 184 -------HLPEITQYSLIK--TSPMFLPSVGRFPQGIAIQISLDMERLSWKTNSEELHSIFQEYYMGQNIVSVVPLEESR 254 (311) Q Consensus 184 -------h~~e~~~~~~~~--~~~~~~~~~~~~~~g~~~~v~v~~~~~~~~~~~~~~~~~~~~~~~~~~~v~v~~~~~~~ 254 (311) T Consensus 238 qs~eeWkGqae~nkil~t~~~i~~dG~Cvr~G~lrChs~~~~~k---lk~d~~~~~~e~~~~~---~n~W~~~~Pn~~~~ 311 (367) T TIGR01745 238 QSREEWKGQAETNKILGTKSTIPVDGLCVRIGALRCHSQALTIK---LKKDVSLEEIEEIIRA---HNPWVKVVPNEREI 311 (367) T ss_pred CCHHHHCCHHHHHHHHCCCCEEEECCEEEEEECEEEEEEEEEEE---EECCCCHHHHHHHHHC---CCCEEEECCCCHHH T ss_conf 63023133145665523343466454478750200000002344---2035777889999864---69714425770466 Q ss_pred CCCCCCHHHHCCCCEEEEEEEEE--CCCCEEEEEEEECCCHHHHHHHHHHHHH Q ss_conf 78986427627996079999980--8997699999722210136899999999 Q gi|254780294|r 255 KIKTIACEMMSGNDKLHLFFFDS--SELPYINIIAVFDNLGKGASGAAIQNMD 305 (311) Q Consensus 255 ~~~~p~~~~~~g~n~v~Vg~~~~--~~~~~~~v~s~~DNL~KGAAgnAVQn~n 305 (311) T Consensus 312 t~~~ltP~~~tG~l~~~~Gr~rklnmG~~y~saf~~GdqllWGaaePlrrml~ 364 (367) T TIGR01745 312 TLRELTPAAVTGTLDIPVGRLRKLNMGPEYLSAFTVGDQLLWGAAEPLRRMLR 364 (367) T ss_pred HHHHCCCCCEECCCCCCCCCEEECCCCHHHHHHHHHHHHHHHCCHHHHHHHHH T ss_conf 88633731110320025220000003534654443322444302038999999

HHsearch alignment for GI: 254780294 and conserved domain: TIGR01745