4Y2L

Structure of CFA/I pili major subunit CfaB trimer

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, E... (A, B, C, D, E...)	CFA/I fimbrial subunit B	polymer	153	15944.9	6	UniProt (E3PPC4) Pfam (PF04449)	Escherichia coli O78:H11 (strain H10407 / ETEC)	CFA/I antigen,CFA/I pilin,Colonization factor antigen I subunit B
2	G, H, I, J (A, C, D)	ISOPROPYL ALCOHOL	non-polymer		60.1	4	Chemie (IPA)
3	K, L (F)	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
4	M, N, O, P, Q... (A, B, C, D, E...)	water	water		18.0	635	Chemie (HOH)

Sequence modifications

A, B, C, D, E, F: 2 - 147 (UniProt: E3PPC4)

PDB	External Database	Details
Met -5	-	initiating methionine
His -4	-	expression tag
His -3	-	expression tag
His -2	-	expression tag
His -1	-	expression tag
His 0	-	expression tag
His 1	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	95669.5
Non-Polymers*	Number of molecules	6
	Total formula weight	320.5
All*	Total formula weight	95990.0

*Water molecules are not included.