>cd04248 AAK_AK-Ectoine AAK_AK-Ectoine: Amino Acid Kinase Superfamily (AAK), AK-Ectoine; this CD includes the N-terminal catalytic domain of the aspartokinase of the ectoine (1,4,5,6-tetrahydro-2-methyl pyrimidine-4-carboxylate) biosynthetic pathway found in Methylomicrobium alcaliphilum, Vibrio cholerae, and other various halotolerant or halophilic bacteria. Bacteria exposed to hyperosmotic stress accumulate organic solutes called 'compatible solutes' of which ectoine, a heterocyclic amino acid, is one. Apart from its osmotic function, ectoine also exhibits a protective effect on proteins, nucleic acids and membranes against a variety of stress factors. de novo synthesis of ectoine starts with the phosphorylation of L-aspartate and shares its first two enzymatic steps with the biosynthesis of amino acids of the aspartate family: aspartokinase and L-aspartate-semialdehyde dehydrogenase. The M. alcaliphilum and the V. cholerae aspartokinases are encoded on the ectABCask operon.

Probab=98.46 E-value=1.4e-06 Score=57.07 Aligned_cols=110 Identities=14% Similarity=0.196 Sum_probs=78.6 Q ss_pred HHHHHHCCCEEEECCCCCCCCCCEECC---CHHHHHHHHHHHHCHHHHHHHCCCCCEEECCCCC--------CCCCCHHH Q ss_conf 999997798499857431787320066---1479999999862511334322676335345555--------56338889 Q 537021.9.peg.3 15 LDLLIKSGIIPVIAPIAPGYDGATYNI---NADTFAGAIAEKLNVIRLLFLTDVPGVLDKNRQL--------ISKLSINE 83 (142) Q Consensus 15 i~~lL~~g~iPVi~pig~~~~G~~~ni---n~D~~a~~lA~~l~A~kli~ltdv~Gv~d~~~~~--------i~~i~~~e 83 (142) T Consensus 183 ~~~~~~~~~v~Vv~GF~~~~~G~~tTLGRgGSDySAailA~~l~A~~~~IWtDV~-v~tADPr~V~~~~a~~i~~lSy~E 261 (304) T cd04248 183 FRDIDPRDELPIVTGYAKCAEGLMREFDRGYSEMTFSRIAVLTGASEAIIHKEFH-LSSADPKLVGEDKARPIGRTNYDV 261 (304) T ss_pred HHHCCCCCCEEEECCCCCCCCCCEEEECCCCCHHHHHHHHHHCCCCEEEEEECCC-EECCCCCCCCCCCCEEECCCCHHH T ss_conf 9722657826885772678998356507997178999999976999899985066-616897957877663606479999 Q ss_pred HHHHHHCCCCCCCHHHHHHHHHHHHHCCCCEEEEEECCCCCHHHHHHHCCCCCCCEE Q ss_conf 999962697678678999999999984998899952578768999996799866345 Q 537021.9.peg.3 84 ARTLIKDGTISGGMIPKIETSIKAIENGVKSVAILDGKKPHSILMEIFTKNGSGTLL 140 (142) Q Consensus 84 ~~~l~~~~~~~~gm~~Ki~~a~~a~~~Gv~~v~i~~~~~~~~ll~elft~~g~GT~i 140 (142) T Consensus 262 A~ELayfGAk--VlHP--~Ti~P~~~~~IP-i~IkNt~~----------P~~~GT~I 303 (304) T cd04248 262 ADQLANLGME--AIHP--KAAKGLRQAGIP-LRVKNTFE----------PDHPGTLI 303 (304) T ss_pred HHHHHHCCCC--CCCH--HHHHHHHHCCCC-EEEECCCC----------CCCCCCEE T ss_conf 9999977972--1598--999999986998-89806899----------89998343

HHsearch alignment for GI: peg_394 and conserved domain: cd04248