Glycosaminoglycan (GAG) polysaccharide lyase family. This family consists of a group of secreted bacterial lyase enzymes capable of acting on glycosaminoglycans, such as hyaluronan and chondroitin, in the extracellular matrix of host tissues, contributing to the invasive capacity of the pathogen. These are broad-specificity glycosaminoglycan lyases which recognize uronyl residues in polysaccharides and cleave their glycosidic bonds via a beta-elimination reaction to form a double bond between C-4 and C-5 of the non-reducing terminal uronyl residues of released products. Substrates include chondroitin, chondroitin 4-sulfate, chondroitin 6-sulfate, and hyaluronic acid. Family members include chondroitin AC lyase, chondroitin abc lyase, xanthan lyase, and hyalurate lyase.

Polysaccharide lyase family 8, super-sandwich domain. This family consists of a group of secreted bacterial lyase enzymes EC:4.2.2.1 capable of acting on hyaluronan and chondroitin in the extracellular matrix of host tissues, contributing to the invasive capacity of the pathogen.

Lyase, catalytic. Members of this family are predominantly found in chondroitin ABC lyase I, and adopt a helical structure, with fifteen alpha-helices which are at least two turns long and several short helical turns. The bulk of the domain is formed by ten alpha-helices forming five hairpin-like pairs and arranged into an incomplete toroid, the (alpha/alpha)5 fold. Additionally, two long and two short alpha-helices at the N-terminus of the domain wrap around the toroid. At the C-terminal end of the toroid there is one additional short alpha-helix. This domain is required for degradation of polysaccharides containing 1,4-beta-D-hexosaminyl and 1,3-beta-D-glucoronosyl or 1,3-alpha-L-iduronosyl linkages to disaccharides containing 4-deoxy-beta-D-gluc-4-enuronosyl groups.

NHL repeat unit of beta-propeller proteins. The NHL(NCL-1, HT2A and LIN-41)-repeat is found in multiple tandem copies, typically as 6 instances. It is about 40 residues long and resembles the WD repeat and other beta-propeller structures. The repeats have a catalytic activity in Peptidyl-glycine alpha-amidating monooxygenase; proteolysis has shown that the Peptidyl-alpha-hydroxyglycine alpha-amidating lyase (PAL) activity is localized to the repeats. Tripartite motif-containing protein 32 interacts with the activation domain of Tat. This interaction is mediated by the NHL repeats.

NHL repeat unit of beta-propeller proteins. The NHL(NCL-1, HT2A and LIN-41)-repeat is found in multiple tandem copies, typically as 6 instances. It is about 40 residues long and resembles the WD repeat and other beta-propeller structures. The repeats have a catalytic activity in Peptidyl-glycine alpha-amidating monooxygenase; proteolysis has shown that the Peptidyl-alpha-hydroxyglycine alpha-amidating lyase (PAL) activity is localized to the repeats. Tripartite motif-containing protein 32 interacts with the activation domain of Tat. This interaction is mediated by the NHL repeats.

ChainA, Chondroitin sulfate ABC endolyase [Proteus vulgaris],7EIQ_A Chain A, Chondroitin sulfate ABC endolyase [Proteus vulgaris],7EIR_A Chain A, Chondroitin sulfate ABC endolyase [Proteus vulgaris],7EIS_A Chain A, Chondroitin sulfate ABC endolyase [Proteus vulgaris]

CRYSTALSTRUCTURE OF CHONDROITIN ABC LYASE I FROM PROTEUS VULGARIS AT 1.9 ANGSTROMS RESOLUTION [Proteus vulgaris]

Crystalstructure of chondroitin sulfate lyase abc from bacteroides thetaiotaomicron wal2926 [Bacteroides thetaiotaomicron],2Q1F_B Crystal structure of chondroitin sulfate lyase abc from bacteroides thetaiotaomicron wal2926 [Bacteroides thetaiotaomicron]

Structureof Paenibacillus xanthan lyase to 2.6 A resolution [Paenibacillus]

CrystalStructure of Bacillus sp. GL1 Xanthan Lyase that Acts on Side Chains of Xanthan [Bacillus sp. GL1],1J0N_A Crystal Structure of Bacillus sp. GL1 Xanthan Lyase that Acts on Side Chains of Xanthan [Bacillus sp. GL1]

Chondroitin sulfate ABC exolyase OS=Bacteroides thetaiotaomicron OX=818 GN=chonabc PE=1 SV=2

Chondroitin sulfate ABC exolyase OS=Bacteroides thetaiotaomicron (strain ATCC 29148 / DSM 2079 / JCM 5827 / CCUG 10774 / NCTC 10582 / VPI-5482 / E50) OX=226186 GN=chonabc PE=1 SV=1

Chondroitin sulfate ABC endolyase OS=Proteus vulgaris OX=585 PE=1 SV=2

Chondroitin sulfate ABC exolyase (Fragment) OS=Proteus vulgaris OX=585 GN=ChABCII PE=1 SV=1

Xanthan lyase OS=Bacillus sp. (strain GL1) OX=84635 GN=xly PE=1 SV=1