5C5E

Structure of KaiA dimer in complex with C-terminal KaiC peptide at 2.8 A resolution

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Circadian clock protein KaiA	polymer	290	33495.1	2	UniProt (Q79PF6) Pfam (PF21714) Pfam (PF07688) In PDB	Synechococcus elongatus (strain PCC 7942)
2	G, H	KaiC C-terminal peptide	polymer	20	2247.5	2	UniProt (by SIFTS) (Q79PF4) In PDB	synthetic construct
3	A, B	2-(6-hydroxy-3-oxo-3H-xanthen-9-yl)-5-[(sulfanylcarbonyl)amino]benzoic acid	non-polymer		407.4	2	Chemie (52M)
4		water	water		18.0	98	Chemie (HOH)

Sequence modifications

A, B: 1 - 284 (UniProt: Q79PF6)

PDB	External Database	Details
His 285	-	expression tag
His 286	-	expression tag
His 287	-	expression tag
His 288	-	expression tag
His 289	-	expression tag
His 290	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	71485.1
Non-Polymers*	Number of molecules	2
	Total formula weight	814.8
All*	Total formula weight	72299.9

*Water molecules are not included.