2GN0

Crystal structure of dimeric biodegradative threonine deaminase (TdcB) from Salmonella typhimurium at 1.7 A resolution (Triclinic form with one complete subunit built in alternate conformation)

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D (A, B, C, D)	Threonine dehydratase catabolic	polymer	342	36887.1	4	UniProt (P11954) Pfam (PF00291)	Salmonella typhimurium	Threonine deaminase
2	E, F (A, C)	SODIUM ION	non-polymer		23.0	2	Chemie (NA)
3	G, H, I, J (A, B, C, D)	water	water		18.0	780	Chemie (HOH)

Sequence modifications

A, B, C, D: 2 - 329 (UniProt: P11954)

PDB	External Database	Details
Met -12	-	cloning artifact
Arg -11	-	cloning artifact
Gly -10	-	cloning artifact
Ser -9	-	cloning artifact
His -8	-	expression tag
His -7	-	expression tag
His -6	-	expression tag
His -5	-	expression tag
His -4	-	expression tag
His -3	-	expression tag
Gly -2	-	cloning artifact
Met -1	-	cloning artifact
Ala 0	-	cloning artifact
Ser 1	-	cloning artifact
Llp 58	Lys 58	modified residue

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	147548.3
Non-Polymers*	Number of molecules	2
	Total formula weight	46.0
All*	Total formula weight	147594.3

*Water molecules are not included.