Glycoside Hydrolase Family 18

Activities in FamilyNod factor hydrolase (EC 3.2.1.-);
Chitin exo-β-1,4-N-acetylglucosaminidase (EC 3.2.1.-);
Di-N-acetylchitobiase / reducing-end exo-hexosaminidase (EC 3.2.1.-);
Peptidoglycan endo-β-1,4-N-acetylglucosaminidase (EC 3.2.1.-);
Chitosanase (EC 3.2.1.132);
Chitinase (EC 3.2.1.14);
Chitin exo-β-1,4-N-acetylglucobiosaminidase (EC 3.2.1.200);
[reducing end] exo-chitinase (EC 3.2.1.201);
β-N-acetylhexosaminidase (EC 3.2.1.52);
Mannosyl-glycoprotein endo-β-N-acetylglucosaminidase (EC 3.2.1.96);
Mechanism Retaining e
ClanGH-K
3D Structure Status( β / α ) 8 barrel
Catalytic Nucleophile/Basecarbonyl oxygen of C-2 acetamido group of substrate
Catalytic Proton DonorGlu (experimental)
NoteContains chitinases of classes III and V. Contains non-catalytic proteins such as xylanase inhibitor; concanavalin B; narbonin
External resourcesCAZypedia; HOMSTRAD; PROSITE;
Commercial Enzyme Provider(s)MEGAZYME; NZYTech; PROZOMIX;
Statistics GenBank accession (42170); Uniprot accession (503); PDB accession (428); 3D entries (111); cryst (2)
| 1 | ... | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | ... | 332 |
Bacteria
Protein Name EC#OrganismGenBank UniprotPDB/3D
 HQ393_09610 (fragment)   Chitinibacter bivalviorum 2T18 QLG88484.1    
 HQ393_01350   Chitinibacter bivalviorum 2T18 QLG86992.1    
 HQ393_07050   Chitinibacter bivalviorum 2T18 QLG88037.1    
 HZU75_03175 (fragment)   Chitinibacter fontanus STM-7 QLI80611.1    
 HZU75_03955   Chitinibacter fontanus STM-7 QLI80753.1    
 HZU75_05500   Chitinibacter fontanus STM-7 QLI81023.1    
 HZU75_05500   Chitinibacter fontanus STM-7 QLI81023.1    
 HZU75_04700   Chitinibacter fontanus STM-7 QLI80884.1    
 HZU75_03355   Chitinibacter fontanus STM-7 QLI80644.1    
 HZU75_05505   Chitinibacter fontanus STM-7 QLI81024.1    
 HZU75_14120   Chitinibacter fontanus STM-7 QLI82572.1    
 HZU75_12335   Chitinibacter fontanus STM-7 QLI83276.1    
 HZU75_05510   Chitinibacter fontanus STM-7 QLI83190.1    
 HZU75_14125   Chitinibacter fontanus STM-7 QLI82573.1    
 HZU75_13405   Chitinibacter fontanus STM-7 QLI82441.1    
 HZU75_02615 (fragment)   Chitinibacter fontanus STM-7 QLI83155.1    
 HZU75_10745   Chitinibacter fontanus STM-7 QLI83248.1    
 HZU75_14430   Chitinibacter fontanus STM-7 QLI82627.1    
 Chi18D   Chitinibacter suncheonensis AEX08600.1    
 Chi18D, partial   Chitinibacter suncheonensis SK16 UHH90001.1    
 FNU76_14900   Chitinimonas arctica R3-44 QDQ29333.1    
 FNU76_14925   Chitinimonas arctica R3-44 QDQ29336.1    
 H9L41_13920   Chitinimonas koreensis R2A43-10 QNM95005.1    
 H9L41_07840   Chitinimonas koreensis R2A43-10 QNM98148.1    
 H9L41_10715   Chitinimonas koreensis R2A43-10 QNM98641.1    
 H9L41_13895   Chitinimonas koreensis R2A43-10 QNM98962.1    
 N8I74_04775   Chitiniphilus purpureus CD1 UXY16336.1    
 N8I74_05005   Chitiniphilus purpureus CD1 UXY16382.1    
 N8I74_02960   Chitiniphilus purpureus CD1 UXY15995.1    
 N8I74_07375 (fragment)   Chitiniphilus purpureus CD1 UXY16829.1    
 N8I74_17860   Chitiniphilus purpureus CD1 UXY17339.1    
 N8I74_14170   Chitiniphilus purpureus CD1 UXY17328.1    
 N8I74_05020   Chitiniphilus purpureus CD1 UXY17288.1    
 N8I74_00260   Chitiniphilus purpureus CD1 UXY15484.1    
 N8I74_04940   Chitiniphilus purpureus CD1 UXY16369.1    
 N8I74_13195   Chitiniphilus purpureus CD1 UXY14266.1    
 N8I74_07465   Chitiniphilus purpureus CD1 UXY16844.1    
 N8I74_00265   Chitiniphilus purpureus CD1 UXY15485.1    
 N8I74_07480   Chitiniphilus purpureus CD1 UXY16847.1    
 N8I74_05010   Chitiniphilus purpureus CD1 UXY16383.1    
 N8I74_05015   Chitiniphilus purpureus CD1 UXY17287.1    
 N8I74_10175   Chitiniphilus purpureus CD1 UXY13690.1    
 N8I74_04990   Chitiniphilus purpureus CD1 UXY16379.1    
 N8I74_05025   Chitiniphilus purpureus CD1 UXY16384.1    
 N8I74_16680   Chitiniphilus purpureus CD1 UXY14934.1    
 N8I74_17410   Chitiniphilus purpureus CD1 UXY15069.1    
 N8I74_13190   Chitiniphilus purpureus CD1 UXY14265.1    
 N8I74_07810 (fragment)   Chitiniphilus purpureus CD1 UXY16909.1    
 chitinase A (ChiA) 3.2.1.14 Chitiniphilus shinanonensis SAY3 BAK53879.1    
 ChiB 3.2.1.14 Chitiniphilus shinanonensis SAY3 BAK53886.1
BAK53886.2
   
 chitinase C (ChiC) 3.2.1.14 Chitiniphilus shinanonensis SAY3 BAK53887.1 F8WSQ0  
 chitobiose-producing exo-chitinase E (ChiE) 3.2.1.14 Chitiniphilus shinanonensis SAY3 BAK53889.1 F8WSQ2  
 endo/exo-chitinase G (ChiG) 3.2.1.14
3.2.1.200
3.2.1.-
Chitiniphilus shinanonensis SAY3 BAK53891.1 F8WSQ4  
 chitobiose-producing chitinase J (ChiJ) 3.2.1.14 Chitiniphilus shinanonensis SAY3 BAK53931.1
BAK53931.2
   
 chitinase K (ChiK) 3.2.1.14 Chitiniphilus shinanonensis SAY3 BAK53933.1    
 ChiM   Chitiniphilus shinanonensis SAY3 BAK53953.1
BAK53953.2
   
 chitinase L (ChiL; CsChiL) 3.2.1.14 Chitiniphilus shinanonensis SAY3 BAK53954.1 F8WSX2 6KST[A,B]
6KXL[A,B]
6KXM[A,B]
6KXN[A,B]
 chitinase O (ChiO) 3.2.1.14 Chitiniphilus shinanonensis SAY3 BAK53970.1    
 ChiD   Chitiniphilus shinanonensis SAY3 BAK53888.1    
 ChiH   Chitiniphilus shinanonensis SAY3 BAK53892.1    
 endo-chitinase P (ChiP) 3.2.1.14 Chitiniphilus shinanonensis SAY3 BDB32677.1    
 chitinase Q (ChiQ) 3.2.1.14 Chitiniphilus shinanonensis SAY3 BDB32678.1    
 chitobiose-producing chitinase R (ChiR) 3.2.1.14 Chitiniphilus shinanonensis SAY3 BDB32679.1    
 ORF   Chitiniphilus shinanonensis SAY3 BDD85229.1    
 glycosyl hydrolase family 18 protein   Chitinivibrio alkaliphilus WP_022636290.1   7Z64[A,B]
7Z65[A]
 chitinase   Chitinolyticbacter meiyuanensis SYBC-H1 ATN39892.1    
 Chi3   Chitinolyticbacter meiyuanensis SYBC-H1 UCJ00147.1    
 Chi3   Chitinolyticbacter meiyuanensis SYBC-H1 UCJ00147.1    
 GWR21_26210   Chitinophaga agri H33E-04 QHS62952.1    
 GWR21_26220   Chitinophaga agri H33E-04 QHS62953.1    
 DLD77_03315   Chitinophaga alhagiae T22 AWO00790.1    
 COR50_19945   Chitinophaga caeni 13 ATL49262.1    
 COR50_01000   Chitinophaga caeni 13 ATL45848.1    
 COR50_19970   Chitinophaga caeni 13 ATL49267.1    
 COR50_19950   Chitinophaga caeni 13 ATL49263.1    
 MYF79_12350   Chitinophaga filiformis YT5 UPK72075.1    
 MYF79_10795   Chitinophaga filiformis YT5 UPK71769.1    
 MYF79_10795   Chitinophaga filiformis YT5 UPK71769.1    
 MYF79_10805   Chitinophaga filiformis YT5 UPK71771.1    
 MYF79_11965   Chitinophaga filiformis YT5 UPK72000.1    
 MKQ68_02820   Chitinophaga horti R8 UYQ94022.1    
 HF324_03075   Chitinophaga oryzae 1303 QJB42510.1    
 HF324_25770   Chitinophaga oryzae 1303 QJB41066.1    
 HF324_25770   Chitinophaga oryzae 1303 QJB41066.1    
 HF324_09375   Chitinophaga oryzae 1303 QJB38052.1    
 KTO58_19585   Chitinophaga pendula MD30B UCJ05875.1    
 KTO58_19585   Chitinophaga pendula MD30B UCJ05875.1    
 KTO58_15490   Chitinophaga pendula MD30B UCJ05099.1    
 KTO58_12980   Chitinophaga pendula MD30B UCJ10068.1    
 KTO58_13510   Chitinophaga pendula MD30B UCJ10169.1    
 KTO58_12970   Chitinophaga pendula MD30B UCJ10066.1    
 KTO58_07050   Chitinophaga pendula MD30B UCJ08935.1    
 KTO58_11035   Chitinophaga pendula MD30B UCJ09699.1    
 KTO58_07205   Chitinophaga pendula MD30B UCJ08963.1    
 KTO58_08525   Chitinophaga pendula MD30B UCJ09214.1    
 Cpin_2186   Chitinophaga pinensis DSM 2588 ACU59678.1    
 Cpin_3919   Chitinophaga pinensis DSM 2588 ACU61381.1    
 Cpin_3805   Chitinophaga pinensis DSM 2588 ACU61267.1    
 endo-β-1,6-glucanase/chitinase (Cpin_2580;CpGlu5N;CpChi18) 3.2.1.14 Chitinophaga pinensis DSM 2588 ACU60063.1    
 Cpin_2184   Chitinophaga pinensis DSM 2588 ACU59676.1    
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