>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=2.8e-42 Score=280.29 Aligned_cols=221 Identities=22% Similarity=0.271 Sum_probs=178.1 Q ss_pred CEEEEEEEEEEEEECCCCCCCCH--HHHHHHHHHHHHHHHCCCEEEEEECCCC--CHHHHHHHC---------------- Q ss_conf 24999994003685388777089--9999999999999976990999823654--102334420---------------- Q gi|254780777|r 6 YKRVLLKVSGEALAGISGFGVDI--DSVNRICADIAEVYAKGIEIGIVVGGGN--IFRGSQVVA---------------- 65 (242) Q Consensus 6 ~KrIViKiGGSsL~~~~~~~~~~--~~i~~ia~~I~~~~~~g~~vviV~sg~~--~~~~~~~~~---------------- 65 (242) T Consensus 1 m~~iV~KFGGTSVg~-------~PverI~~~A~~v~~~~~~g~~vvVVVSA~~g~Td~Lv~~~~~~~~~~~~~~~~~~~~ 73 (504) T TIGR00657 1 MMLIVQKFGGTSVGN-------APVERIRRVAKIVLKEKEKGNQVVVVVSAMAGVTDALVELAEKVSPGPSAAQEKEFLE 73 (504) T ss_pred CCEEEEEECCEEECC-------CCHHHHHHHHHHHHHHHHCCCCEEEEEECCCCCCHHHHHHHHHHCCCCCCCHHHHHHH T ss_conf 974799736757667-------3237899999988887535897389997377533689999986046443303679999 Q ss_pred -----------------------------------------CCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHCC--CC Q ss_conf -----------------------------------------37777540246788888989999999999976188--64 Q gi|254780777|r 66 -----------------------------------------ENYLLCERSTVDSMGMLSTVINALALDLALRKINV--PT 102 (242) Q Consensus 66 -----------------------------------------~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~--~~ 102 (242) T Consensus 74 ~Ir~~~~~~~~~~~~~~~~~~~~~~l~~~e~~~~~~~L~~~~~LGe~~~~~~D~ilS~GE~~S~~l~~~~l~~~G~K~~~ 153 (504) T TIGR00657 74 KIREKHLEILERLIIPQAIAEKLKRLLDAELVLLKKVLLGISYLGEVTPREMDRILSVGERLSIALLSAALEELGVKAKA 153 (504) T ss_pred HHHHHCCCHHHHHCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCHHHHHHHHHHCHHHHHHHHHHHHHHCCCCCCC T ss_conf 99984000477740773368999999998899999999987873468868744131203588899999999745785201 Q ss_pred CCCCCCHHHHH--------------HHHHHHHHHCCHHHHC-CCCCCCCCC---------CCCCCCCHHHHHHHHHHHCH Q ss_conf 11340010024--------------5665432100001100-111112465---------56777621578888864164 Q gi|254780777|r 103 VILSSIFMPQV--------------CEVFSCRNAVSYLSQG-KVVIFSGGT---------GNAFLTTDSAAALRASEIGA 158 (242) Q Consensus 103 ~~~~~~~~~~~--------------~~~~~~~~~~~~~~~~-~~~~~~~~~---------~~~~~~~D~~a~~ia~~~~a 158 (242) T Consensus 154 ~~l~~~~~~I~T~~~~~~A~p~~~~~~~~~~~rL~~~L~~g~~ipvvaGF~G~~~~g~~TtLGRGGSD~tA~llA~aL~A 233 (504) T TIGR00657 154 VSLTGAQAGILTDSNFGRARPDLAVIIEILTERLEPLLEEGDIIPVVAGFQGATEKGEITTLGRGGSDYTAALLAAALKA 233 (504) T ss_pred CCCCCCCCCEEECCCCCCCCCCHHHHHHHHHHHHHHHHHCCCEEEEEEEEEECCCCCEEEEEECCHHHHHHHHHHHHHCC T ss_conf 22114745455447667641202467776699999998469879998400410577507983068068999999986199 Q ss_pred HHHHHCCCCCCCCCCCCCCCCCCCCCCCCCHHHHHHC---CCCCCCHHHHHHHHH-CCCCEEEEECCCCCHHHHHHCCCC Q ss_conf 4665147543512343223444444441159999855---998140999999997-499699951898547999977998 Q gi|254780777|r 159 DVILKGTQVDGVYSADPRVHASSTRFDSLTYNQFIEK---GLKVMDCASVVLARD-CSIPIIVFSIHSPGGIWGGLSGIG 234 (242) Q Consensus 159 d~l~i~tdvdGiyt~dP~~~~~ak~i~~is~~e~l~~---G~~v~~~~A~~~a~~-~gI~v~I~ng~~~~~i~~~l~Ge~ 234 (242) T Consensus 234 d~~~IyTDV~Gi~T~DPR~V~~Ar~i~~isy~Em~ELA~~GAKVLHPr~~ep~~~~~~ip~~v~st~~~---------~a 304 (504) T TIGR00657 234 DECEIYTDVDGIYTTDPRIVPDARRIDEISYEEMLELASFGAKVLHPRTLEPAMRDYKIPIVVKSTFNP---------EA 304 (504) T ss_pred CEEEEEECCCCCEECCCCCCCCCCCCCCCCHHHHHHHHHHCHHHHHHHHHHHHHCCCCCCEEEECCCCC---------CC T ss_conf 689998727950327886376652045448789999985031653278899984679951899607788---------99 Q ss_pred CCCEECCC Q ss_conf 78246689 Q gi|254780777|r 235 RSTIISGE 242 (242) Q Consensus 235 ~GT~I~~~ 242 (242) T Consensus 305 ~GT~I~~~ 312 (504) T TIGR00657 305 PGTLIVAS 312 (504) T ss_pred CCEEECCC T ss_conf 96687177

HHsearch alignment for GI: 254780777 and conserved domain: TIGR00657