4ZKU

P22 Tail Needle Gp26 crystallized at pH 10.0

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Tail needle protein gp26	polymer	237	25075.7	2	UniProt (P35837) In PDB	Enterobacteria phage P22	Head completion protein,Packaged DNA stabilization protein,Tail accessory factor gp26
2	A, B	CHLORIDE ION	non-polymer		35.5	2	Chemie (CL)
3	A, B	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
4		water	water		18.0	466	Chemie (HOH)

Sequence modifications

A, B: 1 - 233 (UniProt: P35837)

PDB	External Database	Details
Gly -3	-	expression tag
Pro -2	-	expression tag
Gly -1	-	expression tag
Ser 0	-	expression tag
Met 222	Leu 222	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	50151.5
Non-Polymers*	Number of molecules	4
	Total formula weight	151.1
All*	Total formula weight	50302.5

*Water molecules are not included.