6NCR

Crystal Structure of Tryptophan-tRNA ligase from Chlamydia trachomatis with bound L-tryptophan

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	Tryptophan--tRNA ligase	polymer	354	40581.4	2	UniProt (O84589) Pfam (PF00579)	Chlamydia trachomatis (strain D/UW-3/Cx)	Tryptophanyl-tRNA synthetase,TrpRS
2	C, P (A, B)	TRYPTOPHAN	non-polymer		204.2	2	Chemie (TRP)
3	D, Q, R, T, U... (A, B)	ACETATE ION	non-polymer		59.0	6	Chemie (ACT)
4	E, F, G, H, I... (A, B)	1,2-ETHANEDIOL	non-polymer		62.1	11	Chemie (EDO)
5	O (A)	CALCIUM ION	non-polymer		40.1	1	Chemie (CA)
6	W, X (A, B)	water	water		18.0	397	Chemie (HOH)

Sequence modifications

A, B: 1 - 346 (UniProt: O84589)

PDB	External Database	Details
Met -7	-	expression tag
Ala -6	-	expression tag
His -5	-	expression tag
His -4	-	expression tag
His -3	-	expression tag
His -2	-	expression tag
His -1	-	expression tag
His 0	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	81162.8
Non-Polymers*	Number of molecules	20
	Total formula weight	1485.5
All*	Total formula weight	82648.4

*Water molecules are not included.