1U9I

Crystal Structure of Circadian Clock Protein KaiC with Phosphorylation Sites

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, E, F	KaiC	polymer	519	58232.7	4	UniProt (Q79PF4) Pfam (PF06745) In PDB	Synechococcus elongatus
2	C, D	KaiC	polymer	519	58152.8	2	UniProt (Q79PF4) Pfam (PF06745) In PDB	Synechococcus elongatus
3	A, B, C, D, E...	MAGNESIUM ION	non-polymer		24.3	6	Chemie (MG)
4	A, B, C, D, E...	ADENOSINE-5'-TRIPHOSPHATE	non-polymer		507.2	12	Chemie (ATP)
5		water	water		18.0	67	Chemie (HOH)

Sequence modifications

A, B, E, F: 1 - 519 (UniProt: Q79PF4)

PDB	External Database	Details
Sep 431	Ser 431	modified residue
Tpo 432	Thr 432	modified residue

C, D: 1 - 519 (UniProt: Q79PF4)

PDB	External Database	Details
Tpo 432	Thr 432	modified residue

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	349236.4
Non-Polymers*	Number of molecules	18
	Total formula weight	6232.0
All*	Total formula weight	355468.4

*Water molecules are not included.