9O66

Crystal Structure of Tryptophanyl-tRNA synthetase from Klebsiella aerogenes

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	355	39766.2	2	UniProt (A0A0H3FKK2) Pfam (PF00579)	Klebsiella aerogenes KCTC 2190	Tryptophanyl-tRNA synthetase,TrpRS
2	C, E (A, B)	IMIDAZOLE	non-polymer		69.1	2	Chemie (IMD)
3	D (B)	CALCIUM ION	non-polymer		40.1	1	Chemie (CA)
4	F, G (A, B)	water	water		18.0	169	Chemie (HOH)

Sequence modifications

A, B: 1 - 334 (UniProt: A0A0H3FKK2)

PDB	External Database	Details
Met -20	-	initiating methionine
Ala -19	-	expression tag
His -18	-	expression tag
His -17	-	expression tag
His -16	-	expression tag
His -15	-	expression tag
His -14	-	expression tag
His -13	-	expression tag
Met -12	-	expression tag
Gly -11	-	expression tag
Thr -10	-	expression tag
Leu -9	-	expression tag
Glu -8	-	expression tag
Ala -7	-	expression tag
Gln -6	-	expression tag
Thr -5	-	expression tag
Gln -4	-	expression tag
Gly -3	-	expression tag
Pro -2	-	expression tag
Gly -1	-	expression tag
Ser 0	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	79532.3
Non-Polymers*	Number of molecules	3
	Total formula weight	178.2
All*	Total formula weight	79710.6

*Water molecules are not included.