Protein Family Models

This family of dehydrogenases act on aldehyde substrates. Members use NADP as a cofactor. The family includes the following members: The prototypical members are the aldehyde dehydrogenases Swiss:P00352 EC:1.2.1.3. Succinate-semialdehyde dehydrogenase Swiss:P25526 EC:1.2.1.16. Lactaldehyde dehydrogenase Swiss:P25553 EC:1.2.1.22. Benzaldehyde dehydrogenase Swiss:P43503 EC:1.2.1.28. Methylmalonate-semialdehyde dehydrogenase Swiss:Q02252 EC:1.2.1.27. Glyceraldehyde-3-phosphate dehydrogenase Swiss:P81406 EC:1.2.1.9. Delta-1-pyrroline-5-carboxylate dehydrogenase Swiss:P30038 EC: 1.5.1.12. Acetaldehyde dehydrogenase Swiss:P17547 EC:1.2.1.10. Glutamate-5-semialdehyde dehydrogenase Swiss:P07004 EC:1.2.1.41. This family also includes omega crystallin Swiss:P30842 an eye lens protein from squid and octopus that has little aldehyde dehydrogenase activity. [1]. 9195888. Structure of mitochondrial aldehyde dehydrogenase: the genetic component of ethanol aversion. Steinmetz CG, Xie P, Weiner H, Hurley TD;. Structure 1997;5:701-711. (from Pfam)

Date:

2024-10-16

Under osmotic stress, betaine aldehyde dehydrogenase oxidizes glycine betaine aldehyde into the osmoprotectant glycine betaine, via the second of two oxidation steps from exogenously supplied choline or betaine aldehyde. This choline-glycine betaine synthesis pathway can be found in gram-positive and gram-negative bacteria. In Escherichia coli, betaine aldehyde dehydrogenase (betB) is osmotically co-induced with choline dehydrogenase (betA) in the presence of choline. These dehydrogenases are located in a betaine gene cluster with the upstream choline transporter (betT) and transcriptional regulator (betI) [1]. Similar to E.coli, betaine synthesis in Staphylococcus xylosus is also influenced by osmotic stress and the presence of choline with genes localized in a functionally equivalent gene cluster [2]. Organization of the betaine gene cluster in Sinorhizobium meliloti and Bacillus subtilis differs from that of E.coli by the absence of upstream choline transporter and transcriptional regulator homologues [2,3]. Additionally, B.subtilis co-expresses a type II alcohol dehydrogenase with betaine aldehyde dehydrogenase instead of choline dehydrogenase as in E.coli, St.xylosus, and Si.meliloti [3]. Betaine aldehyde dehydrogenase is a member of the aldehyde dehydrogenase family (PF00171).

Gene:

betB

Date:

2024-06-21

aldehyde dehydrogenase family protein such as Bacillus subtilis betaine aldehyde dehydrogenase that catalyzes the oxidation of betaine aldehyde to betaine and is involved in the biosynthesis of the osmoprotectant glycine betaine from choline

Date:

2019-12-12