Structure of PDB 1k6l Chain M

Receptor sequence

>1k6lM (length=302) Species: 1063 (Cereibacter sphaeroides) [Search protein sequence]

AEYQNIFSQVQVRGPADLGMTEDVNLANRSGVGPFSTLLGWFGNAQLGPI
YLGSLGVLSLFSGLMWFFTIGIWFWYQAGWNPAVFLRDLFFFSLEPPAPE
YGLSFAAPLKEGGLWLIASFFMFVAVWSWWGRTYLRAQALGMGKHTAWAF
LSAIWLWMVLGFIRPILMGSWSEAVPYGIFSHLDWTNNFSLVHGNLFYNP
FHGLSIAFLYGSALLFAMHGATILAVSRFGGERELEQIADRGTAAERAAL
FWRWTMGFNATMEGIHRWAIWMAVLVTLTGGIGILLSGTVVDNWYVWGQN
HG

3D structure

PDB

1k6l The structure of a mutant photosynthetic reaction center shows unexpected changes in main chain orientations and quinone position.

Chain

Resolution

3.1 Å

3D
structure

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Enzymatic activity

Enzyme Commision number

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	BCL	M	F197 G203 I206 A207 Y210 L214	F197 G203 I206 A207 Y210 L214
BS02	BPH	M	Y210 L214 M218 W252	Y210 L214 M218 W252
BS03	FE	M	H219 E234 H266	H219 E234 H266
BS04	BCL	M	H182 L183	H182 L183
BS05	BCL	M	M122 T186 N187 L196 F197 H202 S205 I206 Y210 G280 I284	M122 T186 N187 L196 F197 H202 S205 I206 Y210 G280 I284
BS06	BPH	M	G63 F67 W129 A149 F150	G63 F67 W129 A149 F150
BS07	U10	M	M218 H219 T222 A248 A249 W252 M256 N259 A260 I265 W268	M218 H219 T222 A248 A249 W252 M256 N259 A260 I265 W268
BS08	SPN	M	F67 F68 I70 W75 W115 S119 W157 G161 F162 H182	F67 F68 I70 W75 W115 S119 W157 G161 F162 H182

Gene Ontology

	Molecular Function
GO:0042314	bacteriochlorophyll binding
GO:0045156	electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity
GO:0046872	metal ion binding

	Biological Process
GO:0009772	photosynthetic electron transport in photosystem II
GO:0015979	photosynthesis
GO:0019684	photosynthesis, light reaction

	Cellular Component
GO:0016020	membrane
GO:0030077	plasma membrane light-harvesting complex
GO:0042717	plasma membrane-derived chromatophore membrane

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Cellular Component

External links

PDB	RCSB:1k6l, PDBe:1k6l, PDBj:1k6l
PDBsum	1k6l
PubMed	11993994
UniProt	P0C0Y9\|RCEM_CERSP Reaction center protein M chain (Gene Name=pufM)

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