3QYD

Crystal structure of a recombinant chimeric trypsin inhibitor

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 (A, C, B)	Chymotrypsin inhibitor 3	polymer	181	20199.9	3	UniProt (P10822) Pfam (PF00197)	Psophocarpus tetragonolobus (Goa bean asparagus bean asparagus pea winged beans)	WCI-3
2	D, E, F (A, C, B)	water	water		18.0	144	Chemie (HOH)

Sequence modifications

A, C, B: 4 - 180 (UniProt: P10822)

PDB	External Database	Details
Gly 0	-	expression tag
Ser 1	-	expression tag
His 2	-	expression tag
Met 3	-	expression tag
Arg 66	Gln 87	engineered mutation
Leu 67	Phe 88	engineered mutation
Arg 68	Leu 89	engineered mutation
Ala 70	Leu 91	engineered mutation
Arg 79	Ala 100	engineered mutation
Tyr 118	Leu 139	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	60599.6
All*	Total formula weight	60599.6

*Water molecules are not included.