Structure of PDB 4tqq Chain L

Receptor sequence

>4tqqL (length=281) Species: 1063 (Cereibacter sphaeroides)

ALLSFERKYRVPGGTLVGGNLFDFWVGPFYVGFFGVATFFFAALGIILIA
WSAVLQGTWNPQLISVYPPALEYGLGGAPLAKGGLWQIITICATGAFVSW
ALREVEICRKLGIGYHIPFAFAFAILAYLTLVLFRPVMMGAWGYAFPYGI
WTHLDWVSNTGYTYGNFHYNPAHMIAISFFFTNALALALHGALVLSAANP
EKGKEMRTPDHEDTFFRDLVGYSIGTLGIHRLGLLLSLSAVFFSALCMII
TGTIWFDQWVDWWQWWVKLPWWANIPGGING

3D structure

• PDB: 4tqq X-ray Transparent Microfluidic Chip for Mesophase-Based Crystallization of Membrane Proteins and On-Chip Structure Determination.
• Chain: L
• Resolution: 2.499 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	L	I49 W100 E104 F121 A124 Y148 V241	I49 W100 E104 F121 A124 Y148 V241
BS02	BCL	L	F146 H153 L154	F146 H153 L154
BS03	BCL	L	F97 A124 L131 V157 T160 Y162 F167 H168 H173 I177 F180 S244 M248	F97 A124 L131 V157 T160 Y162 F167 H168 H173 I177 F180 S244 M248
BS04	UQ1	L	H190 L193 F216 S223 I224 G225 I229	H190 L193 F216 S223 I224 G225 I229
BS05	FE2	L	H190 H230	H190 H230
BS06	U10	L	F29 G35 F39	F29 G35 F39
BS07	BCL	L	H168 M174 I177 S178 T182	H168 M174 I177 S178 T182
BS08	BPH	L	F181 L185 L189	F181 L185 L189

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:4tqq, PDBe:4tqq, PDBj:4tqq
• PDBsum: 4tqq
• PubMed: 25285049
• UniProt: P0C0Y8|RCEL_CERSP Reaction center protein L chain (Gene Name=pufL)