Glycosyl hydrolase family 43 protein similar to Clostridium thermocellum exo-beta-1,3-galactanase CtGH43 and Ruminococcus champanellensis arabinanase Ara43A. This uncharacterized glycosyl hydrolase family 43 (GH43) subgroup belongs to a subgroup which includes characterized enzymes with exo-beta-1,3-galactanase (EC 3.2.1.145, also known as galactan 1,3-beta-galactosidase) activity such as Clostridium thermocellum (Ct1,3Gal43A or CtGH43) and Phanerochaete chrysosporium 1,3Gal43A (Pc1, 3Gal43A), and arabinanase (EC 3.2.1.99) activity such as Ruminococcus champanellensis Ara43A. GH43 are inverting enzymes (i.e. they invert the stereochemistry of the anomeric carbon atom of the substrate) that have an aspartate as the catalytic general base, a glutamate as the catalytic general acid and another aspartate that is responsible for pKa modulation and orienting the catalytic acid. Many GH43 enzymes display both alpha-L-arabinofuranosidase and beta-D-xylosidase activity using aryl-glycosides as substrates. A common structural feature of GH43 enzymes is a 5-bladed beta-propeller domain that contains the catalytic acid and catalytic base. A long V-shaped groove, partially enclosed at one end, forms a single extended substrate-binding surface across the face of the propeller.

Glycosyl hydrolase family 43 protein such as Clostridium thermocellum exo-beta-1,3-galactanase CtGH43 and Ruminococcus champanellensis arabinanase Ara43A. This glycosyl hydrolase family 43 (GH43) subgroup includes characterized enzymes with exo-beta-1,3-galactanase (EC 3.2.1.145, also known as galactan 1,3-beta-galactosidase) activity such as Clostridium thermocellum (Ct1,3Gal43A or CtGH43) and Phanerochaete chrysosporium 1,3Gal43A (Pc1, 3Gal43A), and arabinanase (EC 3.2.1.99) activity such as Ruminococcus champanellensis Ara43A. GH43 are inverting enzymes (i.e. they invert the stereochemistry of the anomeric carbon atom of the substrate) that have an aspartate as the catalytic general base, a glutamate as the catalytic general acid and another aspartate that is responsible for pKa modulation and orienting the catalytic acid. Many GH43 enzymes display both alpha-L-arabinofuranosidase and beta-D-xylosidase activity using aryl-glycosides as substrates. A common structural feature of GH43 enzymes is a 5-bladed beta-propeller domain that contains the catalytic acid and catalytic base. A long V-shaped groove, partially enclosed at one end, forms a single extended substrate-binding surface across the face of the propeller.

BNR repeat-containing family member. BNR_4 is a family which carries the unique sequence motif SxDxGxTW which is so characteristic of the repeats of the BNR family, pfam02012. It is unclear whether or not this unit is repeated throughout the sequences of this family, but if it is then the family is likely to be bacterial neuraminidase.

Glycosyl hydrolase family 43 protein similar to Clostridium thermocellum exo-beta-1,3-galactanase CtGH43 and Ruminococcus champanellensis arabinanase Ara43A. This uncharacterized glycosyl hydrolase family 43 (GH43) subgroup belongs to a subgroup which includes characterized enzymes with exo-beta-1,3-galactanase (EC 3.2.1.145, also known as galactan 1,3-beta-galactosidase) activity such as Clostridium thermocellum (Ct1,3Gal43A or CtGH43) and Phanerochaete chrysosporium 1,3Gal43A (Pc1, 3Gal43A), and arabinanase (EC 3.2.1.99) activity such as Ruminococcus champanellensis Ara43A. GH43 are inverting enzymes (i.e. they invert the stereochemistry of the anomeric carbon atom of the substrate) that have an aspartate as the catalytic general base, a glutamate as the catalytic general acid and another aspartate that is responsible for pKa modulation and orienting the catalytic acid. Many GH43 enzymes display both alpha-L-arabinofuranosidase and beta-D-xylosidase activity using aryl-glycosides as substrates. A common structural feature of GH43 enzymes is a 5-bladed beta-propeller domain that contains the catalytic acid and catalytic base. A long V-shaped groove, partially enclosed at one end, forms a single extended substrate-binding surface across the face of the propeller.

Glycosyl hydrolase family 43 protein such as Clostridium thermocellum exo-beta-1,3-galactanase (Ct1,3Gal43A or CtGH43). This glycosyl hydrolase family 43 (GH43) subgroup includes characterized enzymes with exo-beta-1,3-galactanase (EC 3.2.1.145, also known as galactan 1,3-beta-galactosidase) activity such as Clostridium thermocellum exo-beta-1,3-galactanase (Ct1,3Gal43A or CtGH43), Streptomyces avermitilis MA-4680 = NBRC 14893 (Sa1,3Gal43A;SAV2109) (1,3Gal43A), and Ruminiclostridium thermocellum ATCC 27405 (Ct1,3Gal43A;CtGH43;Cthe_0661) (1,3Gal43A). It belongs to the GH43_CtGH43 subgroup of the glycosyl hydrolase clan F (according to carbohydrate-active enzymes database (CAZY)) which includes family 43 (GH43) and 62 (GH62) families. GH43_CtGH43 includes proteins such as Clostridium thermocellum exo-beta-1,3-galactanase (Ct1,3Gal43A or CtGH43) which is comprised of the GH43 domain, a CBM13 domain, and a dockerin domain, exhibits an unusual ability to hydrolyze beta-1,3-galactan in the presence of a beta-1,6 linked branch, and is missing an essential acidic residue suggesting a mechanism by which it bypasses beta-1,6 linked branches in the substrate. GH43 are inverting enzymes (i.e. they invert the stereochemistry of the anomeric carbon atom of the substrate) that have an aspartate as the catalytic general base, a glutamate as the catalytic general acid and another aspartate that is responsible for pKa modulation and orienting the catalytic acid. Many GH43 enzymes display both alpha-L-arabinofuranosidase and beta-D-xylosidase activity using aryl-glycosides as substrates. A common structural feature of GH43 enzymes is a 5-bladed beta-propeller domain that contains the catalytic acid and catalytic base. A long V-shaped groove, partially enclosed at one end, forms a single extended substrate-binding surface across the face of the propeller.

GlycosideHydrolase BACINT_00347 [Bacteroides intestinalis DSM 17393]

GlycosideHydrolase BACCELL_00856 [Bacteroides cellulosilyticus DSM 14838]

GlycosideHydrolase BT3686 [Bacteroides thetaiotaomicron VPI-5482],5MUL_A Glycoside Hydrolase BT3686 bound to Glucuronic Acid [Bacteroides thetaiotaomicron VPI-5482]

Crystalstructure of a putative neuraminidase (BACOVA_03493) from Bacteroides ovatus ATCC 8483 at 1.74 A resolution [Bacteroides ovatus ATCC 8483]

TheGH43, Beta 1,3 Galactosidase, BT3683 with galactoimidazole [Bacteroides thetaiotaomicron],6EUH_A The GH43, Beta 1,3 Galactosidase, BT3683 with galactodeoxynojirimycin [Bacteroides thetaiotaomicron VPI-5482],6EUH_B The GH43, Beta 1,3 Galactosidase, BT3683 with galactodeoxynojirimycin [Bacteroides thetaiotaomicron VPI-5482],6EUH_C The GH43, Beta 1,3 Galactosidase, BT3683 with galactodeoxynojirimycin [Bacteroides thetaiotaomicron VPI-5482],6EUI_A The GH43, Beta 1,3 Galactosidase, BT3683 with galactose [Bacteroides thetaiotaomicron VPI-5482]

Ulvan lyase, long isoform OS=Alteromonas sp. OX=232 GN=ullA PE=1 SV=1

Ulvan lyase, long isoform OS=Pseudoalteromonas sp. (strain PLSV) OX=1547444 GN=PLSV_3925 PE=1 SV=1

Ulvan lyase, short isoform OS=Alteromonas sp. (strain LOR) OX=1537994 GN=LOR_107 PE=1 SV=1