>cd04915 ACT_AK-Ectoine_2 ACT domains located C-terminal to the catalytic domain of the aspartokinase of the ectoine (1,4,5,6-tetrahydro-2-methyl pyrimidine-4-carboxylate) biosynthetic pathway. This CD includes the second of two ACT domains located C-terminal to the 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 various other 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: aspartokinas

Probab=97.78  E-value=2.2e-05  Score=56.15  Aligned_cols=61  Identities=28%  Similarity=0.342  Sum_probs=51.9

Q ss_pred             CCHHCCC--CCCCCCCCCCHHHHHHHHCCCCEECCCCCCCCCCCCCCCEEECCHHHHHHHHHHHHHHH
Q ss_conf             2000127--75000484100014554128501112344322223331012123024776688789888
Q gi|254780873|r  266 EAQISLR--RLRDHPGISASIFSPLAEAHINIDMIIQNVSEDGQYVDITFTTPSSSLEKALAVLSDNK  331 (411)
Q Consensus       266 i~~Iti~--~~~~~~g~~a~If~~La~~~I~VdmI~qs~s~~~~~~~Isf~i~~~d~~~~~~~L~~~~  331 (411)
T Consensus         2 vaiVs~IG~~m~-~~gvlar~~~AL~~~gInv~a~~Q~~r~----vnvqFVV~~~d~~~Ai~aLH~al   64 (66)
T cd04915           2 VAIVSVIGRDLS-TPGVLARGLAALAEAGIEPIAAHQSMRN----VDVQFVVDRDDYDNAIKALHAAL   64 (66)
T ss_pred             EEEEEEECCCCC-CCHHHHHHHHHHHHCCCCEEEEECCCCE----EEEEEEEEHHHHHHHHHHHHHHH
T ss_conf             689997157887-4427999999999889978988647850----36899982799999999999987