4TQU

Crystal structure of a bacterial ABC transporter involved in the import of the acidic polysaccharide alginate

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	M	AlgM1	polymer	301	34286.6	1	UniProt (Q9KWT8) Pfam (PF00528) In PDB	Sphingomonas sp.
2	N	AlgM2	polymer	305	34496.6	1	UniProt (Q9KWT7) Pfam (PF00528) In PDB	Sphingomonas sp.
3	S, T	AlgS	polymer	363	39574.5	2	UniProt (Q9KWT9) Pfam (PF00005) Pfam (PF17912) Pfam (PF03459) In PDB	Sphingomonas sp.
4	Q	AlgQ2	polymer	516	59688.8	1	UniProt (Q9KWT5) Pfam (PF13416) In PDB	Sphingomonas sp.
5	A	4-deoxy-alpha-L-erythro-hex-4-enopyranuronic acid-(1-4)-beta-D-mannopyranuronic acid-(1-4)-beta-D-mannopyranuronic acid-(1-4)-beta-D-mannopyranuronic acid	branched		704.5	1	In PDB GlyTouCan (G76472TU)
6	Q	CALCIUM ION	non-polymer		40.1	1	Chemie (CA)

Sequence modifications

M: 25 - 324 (UniProt: Q9KWT8)

PDB	External Database	Details
Met 24	-	expression tag

N: 1 - 293 (UniProt: Q9KWT7)

PDB	External Database	Details
Leu 294	-	expression tag
Glu 295	-	expression tag
His 296	-	expression tag
His 297	-	expression tag
His 298	-	expression tag
His 299	-	expression tag
His 300	-	expression tag
His 301	-	expression tag
His 302	-	expression tag
His 303	-	expression tag
His 304	-	expression tag
His 305	-	expression tag

S, T: 1 - 363 (UniProt: Q9KWT9)

PDB	External Database	Details
Gln 160	Glu 160	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	5
	Total formula weight	207620.9
Branched	Number of molecules	1
	Total formula weight	704.5
Non-Polymers*	Number of molecules	1
	Total formula weight	40.1
All*	Total formula weight	208365.5

*Water molecules are not included.