4Q2E

CRYSTAL STRUCTURE OF AN INTRAMEMBRANE CDP-DAG SYNTHETASE CENTRAL FOR PHOSPHOLIPID BIOSYNTHESIS (S200C/S258C, active mutant)

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Phosphatidate cytidylyltransferase	polymer	290	32326.9	2	UniProt (Q9X1B7) Pfam (PF01148) In PDB	Thermotoga maritima MSB8	CDP-DAG synthase, CDP-DG synthase, CDP-diacylglycerol synthase, CDS, CDP-diglyceride pyrophosphorylase, CDP-diglyceride synthase, CTP:phosphatidate cytidylyltransferase
2	A, B	MERCURY (II) ION	non-polymer		200.6	6	Chemie (HG)
3	A, B	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
4	A, B	POTASSIUM ION	non-polymer		39.1	2	Chemie (K)

Sequence modifications

A, B: 21 - 290 (UniProt: Q9X1B7)

PDB	External Database	Details
Met 1	-	expression tag
Gly 2	-	expression tag
Ser 3	-	expression tag
Ser 4	-	expression tag
His 5	-	expression tag
His 6	-	expression tag
His 7	-	expression tag
His 8	-	expression tag
His 9	-	expression tag
His 10	-	expression tag
Ser 11	-	expression tag
Ser 12	-	expression tag
Gly 13	-	expression tag
Leu 14	-	expression tag
Val 15	-	expression tag
Pro 16	-	expression tag
Arg 17	-	expression tag
Gly 18	-	expression tag
Ser 19	-	expression tag
His 20	-	expression tag
Cys 220	Ser 200	engineered mutation
Cys 243	Ser 223	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	64653.8
Non-Polymers*	Number of molecules	10
	Total formula weight	1330.3
All*	Total formula weight	65984.1

*Water molecules are not included.