>TIGR00657 asp_kinases aspartate kinase; InterPro: IPR001341 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 kinase (2.7.2.4 from EC) (AK) catalyzes the first reaction in the aspartate pathway; the phosphorylation of aspartate. The product of this reaction can then be used in the biosynthesis of lysine or in the pathway leading to homoserine, which participates in the biosynthesis of threonine, isoleucine and methionine . In bacteria there are three different aspartate kinase isozymes which differ in sensitivity to repression and inhibition by Lys, Met and Thr. AK1 and AK2 are bifunctional enzymes which both consist of an N-terminal AK domain and a C-terminal homoserine dehydrogenase domain. AK1 is involved in threonine biosynthesis and AK2, in that of methionine. The third isozyme, AK3 is monofunctional and involved in lysine synthesis. In archaea and plants there may be a single isozyme of AK which in plants is multifunctional. This entry represents a region encoding aspartate kinase activity found in both the monofunctional and bifunctional enzymes. Synonym(s): Aspartokinase; GO: 0004072 aspartate kinase activity, 0008652 amino acid biosynthetic process.

Probab=100.00 E-value=0 Score=907.07 Aligned_cols=403 Identities=45% Similarity=0.675 Sum_probs=379.0 Q ss_pred CCEEEEEECCCCCCCH--HHHHHHHHHHHHHHHCCCCEEEEEECCCCHHHHHHHHHHHHHCCC----------------- Q ss_conf 9669996085845888--999999999999996799889998068730489999999861489----------------- Q gi|254780873|r 1 MARIVMKFGGTSVANI--DCIRSAALHVKREVDRGQEVAMVVSAMSGETDRLAELCRQVTSID----------------- 61 (411) Q Consensus 1 M~~iV~KfGGtSv~~~--~~i~~v~~~i~~~~~~g~~~ivVvSA~~g~Td~L~~l~~~~~~~~----------------- 61 (411) T Consensus 1 m~~iV~KFGGTSVg~~PverI~~~A~~v~~~~~~g~~vvVVVSA~~g~Td~Lv~~~~~~~~~~~~~~~~~~~~~Ir~~~~ 80 (504) T TIGR00657 1 MMLIVQKFGGTSVGNAPVERIRRVAKIVLKEKEKGNQVVVVVSAMAGVTDALVELAEKVSPGPSAAQEKEFLEKIREKHL 80 (504) T ss_pred CCEEEEEECCEEECCCCHHHHHHHHHHHHHHHHCCCCEEEEEECCCCCCHHHHHHHHHHCCCCCCCHHHHHHHHHHHHCC T ss_conf 97479973675766732378999999888875358973899973775336899999860464433036799999998400 Q ss_pred ----------------------------------------CHHHHHHHHHHHHHHHHHHHHHHHHHCCC--CCCCCCCCC Q ss_conf ----------------------------------------98899999983129999999999984399--863567332 Q gi|254780873|r 62 ----------------------------------------NARERDVVISTGEQVSSGLMVLALQSLGI--QAISLQGWQ 99 (411) Q Consensus 62 ----------------------------------------~~~~~d~i~s~GE~~s~~l~a~~l~~~G~--~a~~l~~~~ 99 (411) T Consensus 81 ~~~~~~~~~~~~~~~~~~l~~~e~~~~~~~L~~~~~LGe~~~~~~D~ilS~GE~~S~~l~~~~l~~~G~K~~~~~l~~~~ 160 (504) T TIGR00657 81 EILERLIIPQAIAEKLKRLLDAELVLLKKVLLGISYLGEVTPREMDRILSVGERLSIALLSAALEELGVKAKAVSLTGAQ 160 (504) T ss_pred CHHHHHCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCHHHHHHHHHHCHHHHHHHHHHHHHHCCCCCCCCCCCCCC T ss_conf 04777407733689999999988999999999878734688687441312035888999999997457852012211474 Q ss_pred CCCCCCCCCCCCC-----CCCCCCCCHHHHHHHC-CEEEEECCCCCCCCCCEEEECCCCCCHHHHHHHHHHCHHHHHHHC Q ss_conf 4551213355200-----0123621003343106-805860343335568424430686242899999884734556534 Q gi|254780873|r 100 IPIMTDSLHGMAR-----ICRVDEKKIVTHLKKK-QVVVITGFQGLSHDNSVTTLGRGGSDTSAVAIAAAIKADRCDIYT 173 (411) Q Consensus 100 ~~i~t~~~~~~a~-----~~~~~~~~l~~~l~~~-~v~v~~Gf~g~~~~g~~ttlgRGGSD~tA~~ia~~l~A~~~~i~t 173 (411) T Consensus 161 ~~I~T~~~~~~A~p~~~~~~~~~~~rL~~~L~~g~~ipvvaGF~G~~~~g~~TtLGRGGSD~tA~llA~aL~Ad~~~IyT 240 (504) T TIGR00657 161 AGILTDSNFGRARPDLAVIIEILTERLEPLLEEGDIIPVVAGFQGATEKGEITTLGRGGSDYTAALLAAALKADECEIYT 240 (504) T ss_pred CCEEECCCCCCCCCCHHHHHHHHHHHHHHHHHCCCEEEEEEEEEECCCCCEEEEEECCHHHHHHHHHHHHHCCCEEEEEE T ss_conf 54554476676412024677766999999984698799984004105775079830680689999999861996899987 Q ss_pred CHHHHEECCCCCCCCCCEECCCCHHHHHHHHHCCCCCHHHHHHHHHHH-CCCEEEEECCCCCCCCCCCCCCCCCCCCC-- Q ss_conf 614402458421234411056799999998840311013788764331-38526761123777776543545454210-- Q gi|254780873|r 174 DVCGIYTTDPRIEPKAHLMKKISFEEMLEMSSLGAKVMQVRSVELAML-YKMCLFVRSSFEDHGQQEQLGTLICSGED-- 250 (411) Q Consensus 174 dV~Gi~taDPr~v~~a~~i~~lsy~Ea~eLa~~Gakvlhp~~~~~~~~-~~ipi~i~ntf~~~~~~~~~GT~I~~~~~-- 250 (411) T Consensus 241 DV~Gi~T~DPR~V~~Ar~i~~isy~Em~ELA~~GAKVLHPr~~ep~~~~~~ip~~v~st~~----~~a~GT~I~~~~~~~ 316 (504) T TIGR00657 241 DVDGIYTTDPRIVPDARRIDEISYEEMLELASFGAKVLHPRTLEPAMRDYKIPIVVKSTFN----PEAPGTLIVASSKAK 316 (504) T ss_pred CCCCCEECCCCCCCCCCCCCCCCHHHHHHHHHHCHHHHHHHHHHHHHCCCCCCEEEECCCC----CCCCCEEECCCCCCC T ss_conf 2795032788637665204544878999998503165327889998467995189960778----899966871774457 Q ss_pred -----CCCCCCCCCCCCCCCCCHHCCCCCCCC---CCCCCHHHHHHHHCC----CCEECCC----CCCC--CCCCCCCCE Q ss_conf -----122231011123466200012775000---484100014554128----5011123----4432--222333101 Q gi|254780873|r 251 -----IMEKKVITGIAYTKDEAQISLRRLRDH---PGISASIFSPLAEAH----INIDMII----QNVS--EDGQYVDIT 312 (411) Q Consensus 251 -----~~~~~~Vk~Is~~~~i~~Iti~~~~~~---~g~~a~If~~La~~~----I~VdmI~----qs~s--~~~~~~~Is 312 (411) T Consensus 317 ~~~s~~~~~~~~~~~~~~~~~~~~~v~g~~~~~~~~g~~~~vf~~l~~~~~~l~i~v~~I~~~y~Q~~~~~~~~-~~di~ 395 (504) T TIGR00657 317 KGESESMEEPIVKGISLDKNQARVTVSGLGMKGSMPGILAEVFGALAEAGHGLLINVDLISDKYKQSSSKIETS-KTDIS 395 (504) T ss_pred CCCCCCCCCCCEEEEEECCCEEEEEEEECCCCCCCCHHHHHHHHHHHHCCCCEEEEEEEEEEEECCCCCCCCCC-CEEEE T ss_conf 51012266630234411366168998522678751027889999986237942632134675303556764015-30599 Q ss_pred EECCHHH--HHHHHHHH---------HHHHHHCCCCEEEEECCEEEEEEECCCCCCCCCHHHHHHHHHHHCCCEEEEEE- Q ss_conf 2123024--77668878---------98886059615897489169999667866785579999999986798299997- Q gi|254780873|r 313 FTTPSSS--LEKALAVL---------SDNKENIGYDVIQHEDNLVKISAIGIGMQSYAGVASAFFLCLAEKGINIKAIT- 380 (411) Q Consensus 313 f~i~~~d--~~~~~~~L---------~~~~~~~~~~~I~~~~~~a~ISvVG~gm~~~~Giaakif~aL~~~~InI~~is- 380 (411) T Consensus 396 f~v~~~~i~~~~a~~~l~~~f~~~~l~~~~~~~~~~~~~~~~~~a~vS~vG~gm~~~~G~a~~~f~~L~~~~~NI~misQ 475 (504) T TIGR00657 396 FTVDKEDIEADQAKELLKKEFLQTLLKSELNLSALSSVEVEKKLAKVSIVGAGMKSAPGVAAKIFEALAQNGINIEMISQ 475 (504) T ss_pred EEECCCCCCHHHHHHHHHHHHHHHHHHHHHHCCCCCEEEEECCEEEEEEECCCHHCCCCHHHHHHHHHHHCCCCEEEEEE T ss_conf 99625357768999999887887546688731563116770664389987610220565788999887426896899971 Q ss_pred -ECCCEEEEEECHHHHHHHHHHHHHHCCC Q ss_conf -0784899997088999999999987097 Q gi|254780873|r 381 -TSEIKISVLIDSAYTELAVRSLHSCYGL 408 (411) Q Consensus 381 -sSe~~IS~VV~~~d~~~Av~~LH~~F~l 408 (411) T Consensus 476 G~SE~~iS~vv~~~d~~~av~~LH~~~~~ 504 (504) T TIGR00657 476 GTSEIKISFVVDEKDAEKAVRALHEAFFE 504 (504) T ss_pred CCCCEEEEEEECCHHHHHHHHHHHHHHCC T ss_conf 68860799997162478999999998449

HHsearch alignment for GI: 254780873 and conserved domain: TIGR00657