5H71

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

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	4-deoxy-alpha-L-erythro-hex-4-enopyranuronic acid-(1-4)-beta-D-mannopyranuronic acid-(1-4)-beta-D-mannopyranuronic acid	branched		528.4	2	In PDB GlyTouCan (G72509DQ)
3	A, B	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
4	A, B	DI(HYDROXYETHYL)ETHER	non-polymer		106.1	2	Chemie (PEG)
5	B	CHLORIDE ION	non-polymer		35.5	2	Chemie (CL)
6		water	water		18.0	1473	Chemie (HOH)

Sequence modifications

A, B: 1 - 492 (UniProt: Q9KWT5)

PDB	External Database	Details
Lys 253	Arg 277	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	114503.4
Branched	Number of molecules	2
	Total formula weight	1056.7
Non-Polymers*	Number of molecules	6
	Total formula weight	363.3
All*	Total formula weight	115923.5

*Water molecules are not included.