Structure of PDB 1z9k Chain B

Receptor sequence

>1z9kB (length=302) Species: 1063 (Cereibacter sphaeroides)

AEYQNIFSQVQVRGPADLGMTEDVNLANRSGVGPFSTLLGWFGNAQLGPI
YLGSLGVLSLFSGLMWFFTIGIWFWYQAGWNPAVFLRDLFFFSLEPPAPE
YGLSFAAPLKEGGLWLIASFFMFVAVWSWWGRTYLRAQALGMGKHTAWAF
LSAIWLWMVLGFIRPILMGSWSEAVPYGIFSHLDWTNNFSLVHGNLFYNP
FHGLSIAFLYGSALLFAMHGATILAVSRFGGERELEQIADRGTAAERAAL
FWRWTMGFNATMEGIHRWAIWMAVLVTLTGGIGILLSGTVVDNWYVWGQN
HG

3D structure

• PDB: 1z9k Design of a Redox-Linked Active Metal Site: Manganese Bound to Bacterial Reaction Centers at a Site Resembling That of Photosystem II
• Chain: B
• Resolution: 4.6 Å

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)	Binding affinity
BS01	BPH	B	Y210 A213 L214 M218	Y210 A213 L214 M218
BS02	FE	B	H219 E234 H266	H219 E234 H266
BS03	BCL	B	L156 W157 T186 N187 S190 F197 H202 S205 I206 Y210 G280 I284	L156 W157 T186 N187 S190 F197 H202 S205 I206 Y210 G280 I284
BS04	BCL	B	G203 I206 A207 Y210	G203 I206 A207 Y210
BS05	BPH	B	L60 G63 A125 W129 A149 F150 V274 T277	L60 G63 A125 W129 A149 F150 V274 T277
BS06	U10	B	H219 T222 A249 W252 M256 N259 A260 T261 I265 W268	H219 T222 A249 W252 M256 N259 A260 T261 I265 W268

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

External links

• PDB: RCSB:1z9k, PDBe:1z9k, PDBj:1z9k
• PDBsum: 1z9k
• PubMed: 15895982
• UniProt: P0C0Y9|RCEM_CERSP Reaction center protein M chain (Gene Name=pufM)