4NDD

X-ray structure of a double mutant of calexcitin - a neuronal calcium-signalling protein

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)	Calexcitin	polymer	212	24862.8	2	UniProt (O76764)	Doryteuthis pealeii (longfin inshore squid)
2	C, D, E, F, G... (A, B)	CALCIUM ION	non-polymer		40.1	6	Chemie (CA)
3	I, J (A, B)	water	water		18.0	119	Chemie (HOH)

Sequence modifications

A, B: 1 - 191 (UniProt: O76764)

PDB	External Database	Details
Met -20	-	expression tag
Gly -19	-	expression tag
His -18	-	expression tag
His -17	-	expression tag
His -16	-	expression tag
His -15	-	expression tag
His -14	-	expression tag
His -13	-	expression tag
His -12	-	expression tag
His -11	-	expression tag
His -10	-	expression tag
His -9	-	expression tag
Ser -8	-	expression tag
Ser -7	-	expression tag
Gly -6	-	expression tag
His -5	-	expression tag
Ile -4	-	expression tag
Glu -3	-	expression tag
Gly -2	-	expression tag
Arg -1	-	expression tag
His 0	-	expression tag
Asp 61	Thr 61	engineered mutation
Asp 188	Thr 188	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	49725.5
Non-Polymers*	Number of molecules	6
	Total formula weight	240.5
All*	Total formula weight	49966.0

*Water molecules are not included.