5H6U

Structure of alginate-binding protein AlgQ2 in complex with an alginate pentasaccharide

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	AlgQ2	polymer	492	57251.7	2	UniProt (Q9KWT5) Pfam (PF13416) In PDB	Sphingomonas sp.
2	C, D	beta-D-mannopyranuronic acid-(1-4)-beta-D-mannopyranuronic acid-(1-4)-beta-D-mannopyranuronic acid-(1-4)-beta-D-mannopyranuronic acid-(1-4)-beta-D-mannopyranuronic acid	branched		898.6	2	In PDB GlyTouCan (G61688UV)
3	A, B	CALCIUM ION	non-polymer		40.1	6	Chemie (CA)
4		water	water		18.0	552	Chemie (HOH)

Sequence modifications

A, B: 4 - 490 (UniProt: Q9KWT5)

PDB	External Database	Details
Lys 1	-	expression tag
Glu 2	-	expression tag
Ala 3	-	expression tag
Lys 253	Arg 277	engineered mutation
Lys 491	-	expression tag
Asn 492	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	114503.4
Branched	Number of molecules	2
	Total formula weight	1797.3
Non-Polymers*	Number of molecules	6
	Total formula weight	240.5
All*	Total formula weight	116541.2

*Water molecules are not included.