Structure of PDB 1u9i Chain E

Receptor sequence

>1u9iE (length=484) Species: 1140 (Synechococcus elongatus PCC 7942 = FACHB-805) [Search protein sequence]

EHQAIAKMRTMIEGFDDISHGGLPIGRSTLVSGTSGTGKTLFSIQFLYNG
IIEFDEPGVFVTFEETPQDIIKNARSFGWDLAKLVDEGKLFILDASPDPE
GQEVVGGFDLSALIERINYAIQKYRARRVSIDSVTSVFQQYDASSVVRRE
LFRLVARLKQIGATTVMTTERIEEYGPIARYGVEEFVSDNVVILRNVLEG
ERRRRTLEILKLRGTSHMKGEYPFTITDHGINIFPLGAMRLTQRSSNVRV
SSGVVRLDEMCGGGFFKDSIILATGATGTGKTLLVSRFVENACANKERAI
LFAYEESRAQLLRNAYSWGMDFEEMERQNLLKIVCAYPESAGLEDHLQII
KSEINDFKPARIAIDSLSALARGVSNNAFRQFVIGVTGYAKQEEITGLFT
NTSDQFMGAHSITDSHISTITDTIILLQYVEIRGEMSRAINVFKMRGSWH
DKAIREFMISDKGPDIKDSFRNFERIISGSPTRI

3D structure

PDB

1u9i Identification of key phosphorylation sites in the circadian clock protein KaiC by crystallographic and mutagenetic analyses

Chain

Resolution

2.8 Å

3D
structure

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Enzymatic activity

Enzyme Commision number

2.7.11.1: non-specific serine/threonine protein kinase.
3.6.4.-

Interaction with ligand

Site #	Ligand	Ligand chain	Binding residues on receptor (original residue number in PDB)	Binding residues on receptor (residue number reindexed from 1)
BS01	ATP	E	K457 M458 R459 S461 W462 H463	K444 M445 R446 S448 W449 H450
BS02	ATP	E	K224 R226 T228 S229 H230	K211 R213 T215 S216 H217
BS03	MG	E	T295 D378	T282 D365
BS04	ATP	E	T290 G291 G293 K294 T295 L296 W331 R451 I472	T277 G278 G280 K281 T282 L283 W318 R438 I459
BS05	ATP	E	G49 T50 G51 K52 T53 L54 S89 F90 I239	G36 T37 G38 K39 T40 L41 S76 F77 I226

Gene Ontology

	Molecular Function
GO:0000287	magnesium ion binding
GO:0003677	DNA binding
GO:0004674	protein serine/threonine kinase activity
GO:0004712	protein serine/threonine/tyrosine kinase activity
GO:0005515	protein binding
GO:0005524	ATP binding
GO:0016787	hydrolase activity
GO:0016887	ATP hydrolysis activity
GO:0042802	identical protein binding
GO:0044024	histone H2AS1 kinase activity
GO:0046872	metal ion binding
GO:0106310	protein serine kinase activity

	Biological Process
GO:0006338	chromatin remodeling
GO:0006355	regulation of DNA-templated transcription
GO:0007623	circadian rhythm
GO:0009649	entrainment of circadian clock
GO:0016310	phosphorylation
GO:0042752	regulation of circadian rhythm
GO:0042754	negative regulation of circadian rhythm
GO:0048511	rhythmic process
GO:0070297	regulation of phosphorelay signal transduction system

View graph for
Molecular Function

View graph for
Biological Process

External links

PDB	RCSB:1u9i, PDBe:1u9i, PDBj:1u9i
PDBsum	1u9i
PubMed	15347809
UniProt	Q79PF4\|KAIC_SYNE7 Circadian clock oscillator protein KaiC (Gene Name=kaiC)

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