3iwj

Crystal structure of aminoaldehyde dehydrogenase 2 from Pisum sativum (PsAMADH2)

spinqualitylabelsall models 3iwj, resolution 2.15Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3iwj is a 2 chain structure with sequence from Pisum sativum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.15Å Ligands: GOL, NA, NAD Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function AADH2_PEA Dehydrogenase that catalyzes the oxidation of several aminoaldehydes (PubMed:20026072). Metabolizes and detoxifies aldehyde products of polyamine degradation to non-toxic amino acids (Probable). Catalyzes the oxidation of 3-aminopropanal to beta-alanine (Ref.1, PubMed:20026072, PubMed:21740525). Catalyzes the oxidation of 4-aminobutanal to 4-aminobutanoate (PubMed:20026072, PubMed:21740525). Catalyzes the oxidation of 4-guanidinobutanal to 4-guanidinobutanoate (PubMed:20026072). [UniProtKB:P20000] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Aminoaldehyde dehydrogenases (AMADHs, EC 1.2.1.19) belong to the large aldehyde dehydrogenase (ALDH) superfamily, namely, the ALDH9 family. They oxidize polyamine-derived omega-aminoaldehydes to the corresponding omega-amino acids. Here, we report the first X-ray structures of plant AMADHs: two isoenzymes, PsAMADH1 and PsAMADH2, from Pisum sativum in complex with beta-nicotinamide adenine dinucleotide (NAD(+)) at 2.4 and 2.15 A resolution, respectively. Both recombinant proteins are dimeric and, similarly to other ALDHs, each monomer is composed of an oligomerization domain, a coenzyme binding domain and a catalytic domain. Each subunit binds NAD(+) as a coenzyme, contains a solvent-accessible C-terminal peroxisomal targeting signal (type 1) and a cation bound in the cavity close to the NAD(+) binding site. While the NAD(+) binding mode is classical for PsAMADH2, that for PsAMADH1 is unusual among ALDHs. A glycerol molecule occupies the substrate binding site and mimics a bound substrate. Structural analysis and substrate specificity study of both isoenzymes in combination with data published previously on other ALDH9 family members show that the established categorization of such enzymes into distinct groups based on substrate specificity is no more appropriate, because many of them seem capable of oxidizing a large spectrum of aminoaldehyde substrates. PsAMADH1 and PsAMADH2 can oxidize N,N,N-trimethyl-4-aminobutyraldehyde into gamma-butyrobetaine, which is the carnitine precursor in animal cells. This activity highly suggests that in addition to their contribution to the formation of compatible osmolytes such as glycine betaine, beta-alanine betaine and gamma-aminobutyric acid, AMADHs might participate in carnitine biosynthesis in plants. Structural and functional characterization of plant aminoaldehyde dehydrogenase from Pisum sativum with a broad specificity for natural and synthetic aminoaldehydes.,Tylichova M, Kopecny D, Morera S, Briozzo P, Lenobel R, Snegaroff J, Sebela M J Mol Biol. 2010 Mar 5;396(4):870-82. Epub 2009 Dec 21. PMID:20026072 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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