2EJN

Structural characterization of the tetrameric form of the major cat allergen fel D 1

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	Major allergen I polypeptide chain 1, chain 2	polymer	153	17208.8	2	UniProt (P30438) UniProt (P30440) Pfam (PF01099) Pfam (PF09252)	Felis catus (domestic cat)	Allergen Fel d 1-A, Allergen Fel d 1-B
2	C, D, E, F (A, B)	CALCIUM ION	non-polymer		40.1	4	Chemie (CA)
3	G, H (A, B)	water	water		18.0	270	Chemie (HOH)

Sequence modifications

A, B: 1 - 70 (UniProt: P30438)

PDB	External Database	Details
Met 0	-	initiating methionine
His 147	-	expression tag
His 148	-	expression tag
His 149	-	expression tag
His 150	-	expression tag
His 151	-	expression tag
His 152	-	expression tag

A, B: 71 - 146 (UniProt: P30440)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	34417.6
Non-Polymers*	Number of molecules	4
	Total formula weight	160.3
All*	Total formula weight	34577.9

*Water molecules are not included.