Syn/anti lateral protonation

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• Author: ^^^Wim Nerinckx^^^
• Responsible Curator: ^^^Spencer Williams^^^

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Overview

This page will provide a table (and eventually a full lexicon article) on the spatial positioning of the catalytic general acid residue in the active sites of glycoside hydrolases. The table below updates those found in the seminal paper on this concept by Heightman and Vasella [1], and the more recent summary by Nerinckx et al. [2].

Table

This table can be re-sorted by clicking on the icons in the header (javascript must be turned on in your browser). To reset the page to be sorted by GH family, click the page tab above the page title.

Family	Clan	Structure fold	Anomeric specificity	Mechanism	Syn/anti protonator	Example PDB ID	Enzyme	Organism	Ligand	General acid	Nucleophile or General base	Primary reference
GH1	A	(β/α)8	beta	retaining	anti	4pbg	6-phospho-beta-galactosidase	Lactococcus lactis	product	Glu160	Glu375	[3]
GH2	A	(β/α)8	beta	retaining	anti	1jz0	beta-galactosidase	Escherechia coli	2-F-galactosyl	Glu461	Glu537	[4]
GH3	none	(β/α)8	beta	retaining	anti	1iew	exo-1,3-1,4-glucanase	Hordeum vulgare	2-F-glucosyl	Glu491	Asp285	[5]
GH5	A	(β/α)8	beta	retaining	anti	1iew	endo-1,4-glucanase	Bacillus agaradhaerans	2-F-glucosyl	Glu129	Glu228	[6]
GH6	none	(β/α)8	beta	inverting	syn	1ocn	cellobiohydrolase	Humicola insolens	Glc-isofagomine	Asp226	debated	[7]
GH7	B	β-jelly roll	beta	retaining	syn	1ovw	endo-1,4-glucanase	Fusarium oxysporum	Michaelis thio-Glc5	Glu202	Glu197	[8]
GH8	M	(α/α)6	beta	inverting	anti	1kwf	endo-1,4-glucanase	Clostridium thermocellum	Michaelis	Glu95	Asp278	[9]
GH9	none	(α/α)6	beta	inverting	syn	3tf4, 4tf4	cellulase	Thermomonospora fusca	product	Glu424	Asp55, Asp58	[10]
GH10	A	(β/α)8	beta	retaining	anti	2xyl	xylanase B (Cex)	Cellulomonas fimi	Xyl-2-F-xylosyl	Glu127	Glu233	[11]
GH11	C	β-jelly roll	beta	retaining	syn	1bvv	xylanase	Bacillus circulans	Xyl-2-F-xylosyl	Glu172	Glu78	[12]
GH12	C	β-jelly roll	beta	retaining	syn	2nlr	endo-1,4-glucanase	Streptomyces lividans	Glc2-2-F-glucosyl	Glu203	Glu120	[13]
GH13	H	(β/α)8	alpha	retaining	anti	1ckx	beta-cyclodextrin glucanotransferase	Bacillus circulans	Michaelis	Glu257	Asp229	[14]
GH14	none	(β/α)8	alpha	inverting	syn	1b9z	beta-amylase	Bacillus cereus	product	Glu172	Glu367	[15]
GH15	L	(α/α)6	alpha	inverting	syn	1gah	glucoamylase	Aspergillus awamori	acarbose	Glu179	Glu400	[16]
GH16	B	β-jelly roll	beta	retaining	syn	1urx	beta-agarase A	Zobellia galactanivorans	product	Glu152	Glu147	[17]
GH18	K	(β/α)8	beta	retaining	anti	1ffr	chitinase A	Serratia marcescens	Michaelis (NAG)6	Glu315	internal	[18]
GH20	K	(β/α)8	beta	retaining	anti	1c7s	chitobiase	Serratia marcescens	Michaelis chitobiose	Glu540	internal	[19]
GH22	none	lysozyme type	beta	retaining	syn	1h6m	lysozyme C	Gallus gallus	Chit-2-F-chitosyl	Glu35	Asp52	[20]
GH23	none	lysozyme type	beta	inverting	syn	1lsp	lysozyme G	Cygnus atratus	Bulgecin A	Glu73	internal	[21]
GH24	I	α + β	beta	inverting	syn	148l	lysozyme E	Bacteriophage T4	chitobiosyl	Glu11	Glu26	[22]
GH26	A	(β/α)8	beta	retaining	anti	1gw1	mannanase A	Cellvibrio japonicus	(Man2)-2-F-mannosyl	Glu212	Glu320	[23]
GH27	D	(β/α)8	alpha	retaining	anti	1ktc	α-N-acetyl galactosaminidase	Gallus gallus	NAGal	Asp201	Asp410	[24]
GH29	none	(β/α)8	alpha	retaining	syn	1hl9	α-L-fucosidase	Thermotoga maritima	2-F-fucopyranosyl	Glu266	Asp224	[25]
GH31	D	(β/α)8	alpha	retaining	anti	1xsk	α-xylosidase	Escherechia coli	5-F-xylosyl	Asp482	Asp416	[26]
GH32	J	5-fold β-propeller	alpha	retaining	anti	2add	fructan β-(2,1)-fructosidase	Cichorium intybus	sucrose	Glu201	Asp22	[27]
GH33	E	6-fold β-propeller	alpha	retaining	anti	1s0k	trans-sialidase	Trypanosoma cruzi	2-F,3-F-sialosyl	Asp59	Tyr342	[28]
GH34	E	6-fold β-propeller	alpha	retaining	anti	2bat	neuraminidase	Influenza A virus	sialic acid	Asp151	Tyr406	[29]
GH37	G	(α/α)6	alpha	inverting	anti	2jf4	trehalase	Escherechia coli	validoxylamine	Asp312	Glu496	[30]
GH38	none	(β/α)7	alpha	retaining	anti	1qwn	α-mannosidase II	Drosophila melanogaster	5-F-β-L-gulosyl	Asp341	Asp204	[31]
GH39	A	(β/α)8	beta	retaining	anti	1uhv	β-xylosidase	Thermoanaerobacterium saccharolyticum	2-F-xylosyl	Glu160	Glu277	[32]
GH42	A	(β/α)8	beta	retaining	anti	1kwk	β-galactosidase	Thermus thermophylus A4	galactose	Glu141	Glu312	[33]
GH44	none	(β/α)8	beta	retaining	anti	2eqd	endoglucanase	Clostridium thermocellum	cellooctaose	Glu186	Glu359	[34]
GH45	none	six-stranded β-barrel	beta	inverting	syn	4eng	endo-1,4-glucanase	Humicola insolens	product	Asp121	Asp10	[35]
GH47	none	(α/α)7	alpha	inverting	anti	1x9d	α-mannosidase I	Homo sapiens	Michaelis	Asp463	Glu599	[36], [37]
GH51	A	(β/α)8	alpha	retaining	anti	1pz2	α-L-arabinofuranosidase	Geobacillus stearothermophilus	L-arabinofuranosyl	Glu175	Glu294	[38]
GH54	none	β-sandwich	alpha	retaining	anti	1wd4	α-L-arabinofuranosidase B	Aspergillus kawachii	L-arabinofuranose	Asp297	Glu221	[39]
GH56	none	(β/α)7	beta	retaining	anti	1fcv	hyaluronidase	Apis mellifera	(hyaluron.)4	Glu113	internal	[40]
GH57	none	(β/α)7	alpha	retaining	anti	1kly	glucanotransferase	Thermococcus litoralis	acarbose	Asp214	Glu123	[41]
GH67	none	(β/α)8	alpha	inverting	syn	1gql	α-glucuronidase	Cellvibrio japonicus Ueda107	glucuronic acid	Glu292	unknown	[42]
GH68	J	5-fold β-propeller	beta	retaining	anti	1pt2	levansucrase	Bacillus subtilis	sucrose	Glu342	Asp86	[43]
GH74	none	7-fold β-propeller	beta	inverting	syn	2ebs	cellobiohydrolase (OXG-RCBH)	Geotrichum sp. m128	xyloglucan heptasaccharide	Asp465	Asp35	[44]
GH77	H	(β/α)8	alpha	retaining	anti	1esw	amylomaltase	Thermus aquaticus	acarbose	Asp395	Asp293	[45]
GH90	none	(β)-helix	alpha	inverting	anti	1tyw	endo-α-L-1,3-rhamnosidase	Enterobacteris phage P22	epitope fragment	Asp395	Asp392	[46]
GH94	none	(α/α)6	beta	inverting	syn	1v7x	chitobiose phosphorylase	Vibrio proteolyticus	GlcNAc	Asp492	phosphate	[47]
GH95	none	(α/α)6	alpha	inverting	anti	2ead	α-1,2-L-fucosidase	Bifibacterium bifidum	substrate	Glu566	Asn423 Asp766	[48]
GH102	none	double-psi beta-barrel	beta	retaining	syn	2pi8	lytic transglycosylase A	Escherechia coli	chitohexaose	Asp308	none	[49]

References

1. Heightman, T.D. and Vasella, A.T. (1999) Recent Insights into Inhibition, Structure, and Mechanism of Configuration-Retaining Glycosidases. Angewandte Chemie-International Edition 38(6), 750-770. Article online.

2. Nerinckx W, Desmet T, Piens K, and Claeyssens M. (2005). An elaboration on the syn-anti proton donor concept of glycoside hydrolases: electrostatic stabilisation of the transition state as a general strategy. FEBS Lett. 2005;579(2):302-12. DOI:10.1016/j.febslet.2004.12.021 |
3. Wiesmann C, Hengstenberg W, and Schulz GE. (1997). Crystal structures and mechanism of 6-phospho-beta-galactosidase from Lactococcus lactis. J Mol Biol. 1997;269(5):851-60. DOI:10.1006/jmbi.1997.1084 |
4. Juers DH, Heightman TD, Vasella A, McCarter JD, Mackenzie L, Withers SG, and Matthews BW. (2001). A structural view of the action of Escherichia coli (lacZ) beta-galactosidase. Biochemistry. 2001;40(49):14781-94. DOI:10.1021/bi011727i |
5. Hrmova M, Varghese JN, De Gori R, Smith BJ, Driguez H, and Fincher GB. (2001). Catalytic mechanisms and reaction intermediates along the hydrolytic pathway of a plant beta-D-glucan glucohydrolase. Structure. 2001;9(11):1005-16. DOI:10.1016/s0969-2126(01)00673-6 |
6. Varrot A and Davies GJ. (2003). Direct experimental observation of the hydrogen-bonding network of a glycosidase along its reaction coordinate revealed by atomic resolution analyses of endoglucanase Cel5A. Acta Crystallogr D Biol Crystallogr. 2003;59(Pt 3):447-52. DOI:10.1107/s0907444902023405 |
7. Varrot A, Macdonald J, Stick RV, Pell G, Gilbert HJ, and Davies GJ. (2003). Distortion of a cellobio-derived isofagomine highlights the potential conformational itinerary of inverting beta-glucosidases. Chem Commun (Camb). 2003(8):946-7. DOI:10.1039/b301592k |
8. Sulzenbacher G, Driguez H, Henrissat B, Schülein M, and Davies GJ. (1996). Structure of the Fusarium oxysporum endoglucanase I with a nonhydrolyzable substrate analogue: substrate distortion gives rise to the preferred axial orientation for the leaving group. Biochemistry. 1996;35(48):15280-7. DOI:10.1021/bi961946h |
9. Guérin DM, Lascombe MB, Costabel M, Souchon H, Lamzin V, Béguin P, and Alzari PM. (2002). Atomic (0.94 A) resolution structure of an inverting glycosidase in complex with substrate. J Mol Biol. 2002;316(5):1061-9. DOI:10.1006/jmbi.2001.5404 |
10. Irwin D, Shin DH, Zhang S, Barr BK, Sakon J, Karplus PA, and Wilson DB. (1998). Roles of the catalytic domain and two cellulose binding domains of Thermomonospora fusca E4 in cellulose hydrolysis. J Bacteriol. 1998;180(7):1709-14. DOI:10.1128/JB.180.7.1709-1714.1998 |
11. Notenboom V, Birsan C, Warren RA, Withers SG, and Rose DR. (1998). Exploring the cellulose/xylan specificity of the beta-1,4-glycanase cex from Cellulomonas fimi through crystallography and mutation. Biochemistry. 1998;37(14):4751-8. DOI:10.1021/bi9729211 |
12. Sidhu G, Withers SG, Nguyen NT, McIntosh LP, Ziser L, and Brayer GD. (1999). Sugar ring distortion in the glycosyl-enzyme intermediate of a family G/11 xylanase. Biochemistry. 1999;38(17):5346-54. DOI:10.1021/bi982946f |
13. Sulzenbacher G, Mackenzie LF, Wilson KS, Withers SG, Dupont C, and Davies GJ. (1999). The crystal structure of a 2-fluorocellotriosyl complex of the Streptomyces lividans endoglucanase CelB2 at 1.2 A resolution. Biochemistry. 1999;38(15):4826-33. DOI:10.1021/bi982648i |
14. Uitdehaag JC, Mosi R, Kalk KH, van der Veen BA, Dijkhuizen L, Withers SG, and Dijkstra BW. (1999). X-ray structures along the reaction pathway of cyclodextrin glycosyltransferase elucidate catalysis in the alpha-amylase family. Nat Struct Biol. 1999;6(5):432-6. DOI:10.1038/8235 |
15. Mikami B, Adachi M, Kage T, Sarikaya E, Nanmori T, Shinke R, and Utsumi S. (1999). Structure of raw starch-digesting Bacillus cereus beta-amylase complexed with maltose. Biochemistry. 1999;38(22):7050-61. DOI:10.1021/bi9829377 |
16. Aleshin AE, Stoffer B, Firsov LM, Svensson B, and Honzatko RB. (1996). Crystallographic complexes of glucoamylase with maltooligosaccharide analogs: relationship of stereochemical distortions at the nonreducing end to the catalytic mechanism. Biochemistry. 1996;35(25):8319-28. DOI:10.1021/bi960321g |
17. Allouch J, Helbert W, Henrissat B, and Czjzek M. (2004). Parallel substrate binding sites in a beta-agarase suggest a novel mode of action on double-helical agarose. Structure. 2004;12(4):623-32. DOI:10.1016/j.str.2004.02.020 |
18. Papanikolau Y, Prag G, Tavlas G, Vorgias CE, Oppenheim AB, and Petratos K. (2001). High resolution structural analyses of mutant chitinase A complexes with substrates provide new insight into the mechanism of catalysis. Biochemistry. 2001;40(38):11338-43. DOI:10.1021/bi010505h |
19. Prag G, Papanikolau Y, Tavlas G, Vorgias CE, Petratos K, and Oppenheim AB. (2000). Structures of chitobiase mutants complexed with the substrate Di-N-acetyl-d-glucosamine: the catalytic role of the conserved acidic pair, aspartate 539 and glutamate 540. J Mol Biol. 2000;300(3):611-7. DOI:10.1006/jmbi.2000.3906 |
20. Vocadlo DJ, Davies GJ, Laine R, and Withers SG. (2001). Catalysis by hen egg-white lysozyme proceeds via a covalent intermediate. Nature. 2001;412(6849):835-8. DOI:10.1038/35090602 |
21. Karlsen S, Hough E, Rao ZH, and Isaacs NW. (1996). Structure of a bulgecin-inhibited g-type lysozyme from the egg white of the Australian black swan. A comparison of the binding of bulgecin to three muramidases. Acta Crystallogr D Biol Crystallogr. 1996;52(Pt 1):105-14. DOI:10.1107/S0907444995008468 |
22. Baldwin EP, Hajiseyedjavadi O, Baase WA, and Matthews BW. (1993). The role of backbone flexibility in the accommodation of variants that repack the core of T4 lysozyme. Science. 1993;262(5140):1715-8. DOI:10.1126/science.8259514 |
23. Ducros VM, Zechel DL, Murshudov GN, Gilbert HJ, Szabó L, Stoll D, Withers SG, and Davies GJ. (2002). Substrate distortion by a beta-mannanase: snapshots of the Michaelis and covalent-intermediate complexes suggest a B(2,5) conformation for the transition state. Angew Chem Int Ed Engl. 2002;41(15):2824-7. DOI:10.1002/1521-3773(20020802)41:15<2824::AID-ANIE2824>3.0.CO;2-G |
24. Garman SC, Hannick L, Zhu A, and Garboczi DN. (2002). The 1.9 A structure of alpha-N-acetylgalactosaminidase: molecular basis of glycosidase deficiency diseases. Structure. 2002;10(3):425-34. DOI:10.1016/s0969-2126(02)00726-8 |
25. Sulzenbacher G, Bignon C, Nishimura T, Tarling CA, Withers SG, Henrissat B, and Bourne Y. (2004). Crystal structure of Thermotoga maritima alpha-L-fucosidase. Insights into the catalytic mechanism and the molecular basis for fucosidosis. J Biol Chem. 2004;279(13):13119-28. DOI:10.1074/jbc.M313783200 |
26. Lovering AL, Lee SS, Kim YW, Withers SG, and Strynadka NC. (2005). Mechanistic and structural analysis of a family 31 alpha-glycosidase and its glycosyl-enzyme intermediate. J Biol Chem. 2005;280(3):2105-15. DOI:10.1074/jbc.M410468200 |
27. Verhaest M, Lammens W, Le Roy K, De Ranter CJ, Van Laere A, Rabijns A, and Van den Ende W. (2007). Insights into the fine architecture of the active site of chicory fructan 1-exohydrolase: 1-kestose as substrate vs sucrose as inhibitor. New Phytol. 2007;174(1):90-100. DOI:10.1111/j.1469-8137.2007.01988.x |
28. Amaya MF, Watts AG, Damager I, Wehenkel A, Nguyen T, Buschiazzo A, Paris G, Frasch AC, Withers SG, and Alzari PM. (2004). Structural insights into the catalytic mechanism of Trypanosoma cruzi trans-sialidase. Structure. 2004;12(5):775-84. DOI:10.1016/j.str.2004.02.036 |
29. Varghese JN, McKimm-Breschkin JL, Caldwell JB, Kortt AA, and Colman PM. (1992). The structure of the complex between influenza virus neuraminidase and sialic acid, the viral receptor. Proteins. 1992;14(3):327-32. DOI:10.1002/prot.340140302 |
30. Gibson RP, Gloster TM, Roberts S, Warren RA, Storch de Gracia I, García A, Chiara JL, and Davies GJ. (2007). Molecular basis for trehalase inhibition revealed by the structure of trehalase in complex with potent inhibitors. Angew Chem Int Ed Engl. 2007;46(22):4115-9. DOI:10.1002/anie.200604825 |
31. Numao S, Kuntz DA, Withers SG, and Rose DR. (2003). Insights into the mechanism of Drosophila melanogaster Golgi alpha-mannosidase II through the structural analysis of covalent reaction intermediates. J Biol Chem. 2003;278(48):48074-83. DOI:10.1074/jbc.M309249200 |
32. Yang JK, Yoon HJ, Ahn HJ, Lee BI, Pedelacq JD, Liong EC, Berendzen J, Laivenieks M, Vieille C, Zeikus GJ, Vocadlo DJ, Withers SG, and Suh SW. (2004). Crystal structure of beta-D-xylosidase from Thermoanaerobacterium saccharolyticum, a family 39 glycoside hydrolase. J Mol Biol. 2004;335(1):155-65. DOI:10.1016/j.jmb.2003.10.026 |
33. Hidaka M, Fushinobu S, Ohtsu N, Motoshima H, Matsuzawa H, Shoun H, and Wakagi T. (2002). Trimeric crystal structure of the glycoside hydrolase family 42 beta-galactosidase from Thermus thermophilus A4 and the structure of its complex with galactose. J Mol Biol. 2002;322(1):79-91. DOI:10.1016/s0022-2836(02)00746-5 |
34. Kitago Y, Karita S, Watanabe N, Kamiya M, Aizawa T, Sakka K, and Tanaka I. (2007). Crystal structure of Cel44A, a glycoside hydrolase family 44 endoglucanase from Clostridium thermocellum. J Biol Chem. 2007;282(49):35703-11. DOI:10.1074/jbc.M706835200 |
35. Davies GJ, Dodson G, Moore MH, Tolley SP, Dauter Z, Wilson KS, Rasmussen G, and Schülein M. (1996). Structure determination and refinement of the Humicola insolens endoglucanase V at 1.5 A resolution. Acta Crystallogr D Biol Crystallogr. 1996;52(Pt 1):7-17. DOI:10.1107/S0907444995009280 |
36. Karaveg K, Siriwardena A, Tempel W, Liu ZJ, Glushka J, Wang BC, and Moremen KW. (2005). Mechanism of class 1 (glycosylhydrolase family 47) {alpha}-mannosidases involved in N-glycan processing and endoplasmic reticulum quality control. J Biol Chem. 2005;280(16):16197-207. DOI:10.1074/jbc.M500119200 |
37. Cantú D, Nerinckx W, and Reilly PJ. (2008). Theory and computation show that Asp463 is the catalytic proton donor in human endoplasmic reticulum alpha-(1-->2)-mannosidase I. Carbohydr Res. 2008;343(13):2235-42. DOI:10.1016/j.carres.2008.05.026 |
38. Hövel K, Shallom D, Niefind K, Belakhov V, Shoham G, Baasov T, Shoham Y, and Schomburg D. (2003). Crystal structure and snapshots along the reaction pathway of a family 51 alpha-L-arabinofuranosidase. EMBO J. 2003;22(19):4922-32. DOI:10.1093/emboj/cdg494 |
39. Miyanaga A, Koseki T, Matsuzawa H, Wakagi T, Shoun H, and Fushinobu S. (2004). Crystal structure of a family 54 alpha-L-arabinofuranosidase reveals a novel carbohydrate-binding module that can bind arabinose. J Biol Chem. 2004;279(43):44907-14. DOI:10.1074/jbc.M405390200 |
40. Marković-Housley Z, Miglierini G, Soldatova L, Rizkallah PJ, Müller U, and Schirmer T. (2000). Crystal structure of hyaluronidase, a major allergen of bee venom. Structure. 2000;8(10):1025-35. DOI:10.1016/s0969-2126(00)00511-6 |
41. Imamura H, Fushinobu S, Yamamoto M, Kumasaka T, Jeon BS, Wakagi T, and Matsuzawa H. (2003). Crystal structures of 4-alpha-glucanotransferase from Thermococcus litoralis and its complex with an inhibitor. J Biol Chem. 2003;278(21):19378-86. DOI:10.1074/jbc.M213134200 |
42. Nurizzo D, Nagy T, Gilbert HJ, and Davies GJ. (2002). The structural basis for catalysis and specificity of the Pseudomonas cellulosa alpha-glucuronidase, GlcA67A. Structure. 2002;10(4):547-56. DOI:10.1016/s0969-2126(02)00742-6 |
43. Meng G and Fütterer K. (2003). Structural framework of fructosyl transfer in Bacillus subtilis levansucrase. Nat Struct Biol. 2003;10(11):935-41. DOI:10.1038/nsb974 |
44. Yaoi K, Kondo H, Hiyoshi A, Noro N, Sugimoto H, Tsuda S, Mitsuishi Y, and Miyazaki K. (2007). The structural basis for the exo-mode of action in GH74 oligoxyloglucan reducing end-specific cellobiohydrolase. J Mol Biol. 2007;370(1):53-62. DOI:10.1016/j.jmb.2007.04.035 |
45. Przylas I, Terada Y, Fujii K, Takaha T, Saenger W, and Sträter N. (2000). X-ray structure of acarbose bound to amylomaltase from Thermus aquaticus. Implications for the synthesis of large cyclic glucans. Eur J Biochem. 2000;267(23):6903-13. DOI:10.1046/j.1432-1033.2000.01790.x |
46. Steinbacher S, Baxa U, Miller S, Weintraub A, Seckler R, and Huber R. (1996). Crystal structure of phage P22 tailspike protein complexed with Salmonella sp. O-antigen receptors. Proc Natl Acad Sci U S A. 1996;93(20):10584-8. DOI:10.1073/pnas.93.20.10584 |
47. Hidaka M, Honda Y, Kitaoka M, Nirasawa S, Hayashi K, Wakagi T, Shoun H, and Fushinobu S. (2004). Chitobiose phosphorylase from Vibrio proteolyticus, a member of glycosyl transferase family 36, has a clan GH-L-like (alpha/alpha)(6) barrel fold. Structure. 2004;12(6):937-47. DOI:10.1016/j.str.2004.03.027 |
48. Nagae M, Tsuchiya A, Katayama T, Yamamoto K, Wakatsuki S, and Kato R. (2007). Structural basis of the catalytic reaction mechanism of novel 1,2-alpha-L-fucosidase from Bifidobacterium bifidum. J Biol Chem. 2007;282(25):18497-18509. DOI:10.1074/jbc.M702246200 |
49. van Straaten KE, Barends TR, Dijkstra BW, and Thunnissen AM. (2007). Structure of Escherichia coli Lytic transglycosylase MltA with bound chitohexaose: implications for peptidoglycan binding and cleavage. J Biol Chem. 2007;282(29):21197-205. DOI:10.1074/jbc.M701818200 |