1RIO

Structure of bacteriophage lambda cI-NTD in complex with sigma-region4 of Thermus aquaticus bound to DNA

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	U	27-MER	polymer	27	8293.3	1
2	T	27-MER	polymer	27	8302.3	1
3	H	sigma factor SigA	polymer	73	8719.1	1	UniProt (Q9EZJ8) Pfam (PF04545) In PDB	Thermus aquaticus
4	A, B	Repressor protein CI	polymer	98	11150.3	2	UniProt (P03034) Pfam (PF01381) In PDB	Enterobacteria phage lambda
5	A	CALCIUM ION	non-polymer		40.1	1	Chemie (CA)
6	A	(4S)-2-METHYL-2,4-PENTANEDIOL	non-polymer		118.2	1	Chemie (MPD)
7		water	water		18.0	176	Chemie (HOH)

Sequence modifications

A, B: 1 - 92 (UniProt: P03034)

PDB	External Database	Details
Mse 41	Met 40	MODIFIED RESIDUE
Mse 43	Met 42	MODIFIED RESIDUE
Mse 88	Met 87	MODIFIED RESIDUE
His 93	-	EXPRESSION TAG
His 94	-	EXPRESSION TAG
His 95	-	EXPRESSION TAG
His 96	-	EXPRESSION TAG
His 97	-	EXPRESSION TAG
His 98	-	EXPRESSION TAG

Contents of the asymmetric unit

Polymers	Number of chains	5
	Total formula weight	47615.4
Non-Polymers*	Number of molecules	2
	Total formula weight	158.3
All*	Total formula weight	47773.6

*Water molecules are not included.