1Z3E

Crystal Structure of Spx in Complex with the C-terminal Domain of the RNA Polymerase Alpha Subunit

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	Regulatory protein spx	polymer	132	15690.0	1	UniProt (O31602) Pfam (PF03960) In PDB	Bacillus subtilis
2	B	DNA-directed RNA polymerase alpha chain	polymer	73	8381.7	1	UniProt (P20429) Pfam (PF03118) In PDB	Bacillus subtilis	RNAP alpha subunit, Transcriptase alpha chain, RNA polymerase alpha subunit
3	A, B	SULFATE ION	non-polymer		96.1	4	Chemie (SO4)
4		water	water		18.0	143	Chemie (HOH)

Sequence modifications

A: 1 - 131 (UniProt: O31602)

PDB	External Database	Details
His 0	-	CLONING ARTIFACT

B: 245 - 314 (UniProt: P20429)

PDB	External Database	Details
Met 243	-	CLONING ARTIFACT
Glu 244	-	CLONING ARTIFACT
Gly 315	-	CLONING ARTIFACT

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	24071.7
Non-Polymers*	Number of molecules	4
	Total formula weight	384.3
All*	Total formula weight	24456.0

*Water molecules are not included.