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	A (U)	27-MER	polymer	27	8293.3	1
2	B (T)	27-MER	polymer	27	8302.3	1
3	C (H)	sigma factor SigA	polymer	73	8719.1	1	UniProt (Q9EZJ8) Pfam (PF04545)	Thermus aquaticus
4	D, E (A, B)	Repressor protein CI	polymer	98	11150.3	2	UniProt (P03034) Pfam (PF01381)	Enterobacteria phage lambda
5	F (A)	CALCIUM ION	non-polymer		40.1	1	Chemie (CA)
6	G (A)	(4S)-2-METHYL-2,4-PENTANEDIOL	non-polymer		118.2	1	Chemie (MPD)
7	H, I, J, K, L (U, T, H, A, B)	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.