Beta-L-arabinofuranosidase, GH127. One member of this family, from Bidobacterium longicum, UniProtKB:E8MGH8, has been characterized as an unusual beta-L-arabinofuranosidase enzyme, EC:3.2.1.185. It rleases l-arabinose from the l-arabinofuranose (Araf)-beta1,2-Araf disaccharide and also transglycosylates 1-alkanols with retention of the anomeric configuration. Terminal beta-l-arabinofuranosyl residues have been found in arabinogalactan proteins from a mumber of different plantt species. beta-l-Arabinofuranosyl linkages with 1-4 arabinofuranosides are also found in the sugar chains of extensin and solanaceous lectins, hydroxyproline (Hyp)2-rich glycoproteins that are widely observed in plant cell wall fractions. The critical residue for catalytic activity is Glu-338, in a ET/SCAS sequence context.

Uncharacterized conserved protein, DUF1680 family [Function unknown].

Secretion system C-terminal sorting domain. Species that include Porphyromonas gingivalis, Fibrobacter succinogenes, Flavobacterium johnsoniae, Cytophaga hutchinsonii, Gramella forsetii, Prevotella intermedia, and Salinibacter ruber have on average twenty or more copies of this C-terminal domain, associated with sorting to the outer membrane and covalent modification. This domain targets proteins to type IX secretion systems and is secreted then cleaved off by a C-terminal signal peptidease. Based on similarity to other families it is likely that this domain adopts an immunoglobulin like fold.

ChainAAA, Acetyl-CoA carboxylase, biotin carboxylase [Bacteroides thetaiotaomicron VPI-5482]

Beta-L-arabinofuranosidase[Bacteroides thetaiotaomicron]

ChainA, Non-reducing end beta-L-arabinofuranosidase [Bifidobacterium longum subsp. longum JCM 1217]

Thecrystal structure of native HypBA1 from Bifidobacterium longum JCM 1217 [Bifidobacterium longum subsp. longum JCM 1217],3WRG_A The complex structure of HypBA1 with L-arabinose [Bifidobacterium longum subsp. longum JCM 1217]

Crystalstructure of GH127 beta-L-arabinofuranosidase HypBA1 from Bifidobacterium longum ligand free form [Bifidobacterium longum subsp. longum JCM 1217],3WKX_A Crystal structure of GH127 beta-L-arabinofuranosidase HypBA1 from Bifidobacterium longum arabinose complex form [Bifidobacterium longum subsp. longum JCM 1217],7BZL_A Chain A, Non-reducing end beta-L-arabinofuranosidase [Bifidobacterium longum subsp. longum JCM 1217],7DIF_A Chain A, Non-reducing end beta-L-arabinofuranosidase [Bifidobacterium longum subsp. longum JCM 1217],7EXV_A Chain A, Non-reducing end beta-L-arabinofuranosidase [Bifidobacterium longum subsp. longum JCM 1217],7EXW_A Chain A, Non-reducing end beta-L-arabinofuranosidase [Bifidobacterium longum subsp. longum JCM 1217]