3W6D

Crystal structure of catalytic domain of chitinase from Ralstonia sp. A-471 (E141Q) in complex with tetrasaccharide

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D (A, B, C, D)	Lysozyme-like chitinolytic enzyme	polymer	183	20335.5	4	UniProt (B7XCV4) Pfam (PF01464)	Ralstonia
2	E, F, H (E, F, H)	2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	branched		830.8	3	In PDB GlyTouCan (G01361SX)
3	G (G)	2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	branched		627.6	1	In PDB BIRD (PRD_900017) GlyTouCan (G47362BJ)		triacetyl-beta-chitotriose
4	I, J, K, L (A, B, C, D)	water	water		18.0	293	Chemie (HOH)

Sequence modifications

A, B, C, D: 89 - 252 (UniProt: B7XCV4)

PDB	External Database	Details
Met 72	-	expression tag
Asn 73	-	expression tag
His 74	-	expression tag
Lys 75	-	expression tag
Val 76	-	expression tag
His 77	-	expression tag
His 78	-	expression tag
His 79	-	expression tag
His 80	-	expression tag
His 81	-	expression tag
His 82	-	expression tag
Ile 83	-	expression tag
Glu 84	-	expression tag
Gly 85	-	expression tag
Arg 86	-	expression tag
His 87	-	expression tag
Met 88	-	expression tag
Gln 141	Glu 141	engineered mutation
Ser 253	-	expression tag
Arg 254	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	81341.9
Branched	Number of molecules	4
	Total formula weight	3120.0
All*	Total formula weight	84461.8

*Water molecules are not included.