1C51: Protein
Photosynthetic reaction center and core antenna system (trimeric), alpha carbon only. Determined by X-ray diffraction at 4.0 Å resolution. Released 31 Mar 2000.
- Method
- X-ray diffraction
- Resolution
- 4.0 Å
- Organism
- Synechococcus elongatus
- Chains
- 8
- Atoms
- 3,672
- Mol. weight
- 223.37 kDa
- Ligands
- CLA, PQN, SF4
- Released
- 31 Mar 2000
Explore 1C51 in 3D
Show helices and sheets
RCSB PDB
PDBe
Secondary structure: helices and β-sheets
1C51 contains 44 α-helices and 5 β-strands across 8 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.
Chain A: 15 helices, 0 β-strands
| Element | Residues | Length | Sheet |
|---|
| α-helix | 1-12 | 12 | |
| α-helix | 18-23 | 6 | |
| α-helix | 29-60 | 32 | |
| α-helix | 103-131 | 29 | |
| α-helix | 149-173 | 25 | |
| α-helix | 225-246 | 22 | |
| α-helix | 275-298 | 24 | |
| α-helix | 310-339 | 30 | |
| α-helix | 356-382 | 27 | |
| α-helix | 414-439 | 26 | |
| α-helix | 467-492 | 26 | |
| α-helix | 504-516 | 13 | |
| α-helix | 522-542 | 21 | |
| α-helix | 547-555 | 9 | |
| α-helix | 569-597 | 29 | |
Chain B: 15 helices, 0 β-strands
| Element | Residues | Length | Sheet |
|---|
| α-helix | 4-12 | 9 | |
| α-helix | 16-23 | 8 | |
| α-helix | 30-57 | 28 | |
| α-helix | 99-121 | 23 | |
| α-helix | 135-163 | 29 | |
| α-helix | 215-233 | 19 | |
| α-helix | 257-278 | 22 | |
| α-helix | 295-321 | 27 | |
| α-helix | 336-360 | 25 | |
| α-helix | 412-438 | 27 | |
| α-helix | 471-497 | 27 | |
| α-helix | 512-521 | 10 | |
| α-helix | 532-554 | 23 | |
| α-helix | 559-570 | 12 | |
| α-helix | 590-619 | 30 | |
Chain C: 2 helices, 0 β-strands
| Element | Residues | Length | Sheet |
|---|
| α-helix | 16-19 | 4 | |
| α-helix | 49-52 | 4 | |
Chain D: 1 helix, 0 β-strands
| Element | Residues | Length | Sheet |
|---|
| α-helix | 51-59 | 9 | |
Chain E: 0 helices, 5 β-strands
| Element | Residues | Length | Sheet |
|---|
| β-strand | 6-9 | 4 | 1 |
| β-strand | 20-25 | 6 | 1 |
| β-strand | 36-39 | 4 | 1 |
| β-strand | 58-60 | 3 | 1 |
| β-strand | 67-69 | 3 | 1 |
Chain F: 5 helices, 0 β-strands
| Element | Residues | Length | Sheet |
|---|
| α-helix | 43-64 | 22 | |
| α-helix | 76-93 | 18 | |
| α-helix | 100-121 | 22 | |
| α-helix | 134-139 | 6 | |
| α-helix | 141-153 | 13 | |
Chain K: 2 helices, 0 β-strands
| Element | Residues | Length | Sheet |
|---|
| α-helix | 7-26 | 20 | |
| α-helix | 53-75 | 23 | |
Chain L: 4 helices, 0 β-strands
| Element | Residues | Length | Sheet |
|---|
| α-helix | 1-12 | 12 | |
| α-helix | 20-37 | 18 | |
| α-helix | 51-76 | 26 | |
| α-helix | 91-118 | 28 | |
Molecules and chains
| Molecule | Chains | Type | Length | Organism | UniProt |
|---|
| Protein (photosystem I: subunit psaa) | A | protein | 597 | Synechococcus elongatus | |
| Protein (photosystem I: subunit psab ) | B | protein | 619 | Synechococcus elongatus | |
| Protein (photosystem I: subunit psac) | C | protein | 77 | Synechococcus elongatus | |
| Protein (photosystem I: subunit psad) | D | protein | 125 | Synechococcus elongatus | |
| Protein (photosystem I: subunit psae) | E | protein | 75 | Synechococcus elongatus | |
| Protein (photosystem I: subunit psaf) | F | protein | 153 | Synechococcus elongatus | |
| Protein (photosystem I: subunit psak) | K | protein | 78 | Synechococcus elongatus | |
| Protein (photosystem I: subunit psal) | L | protein | 120 | Synechococcus elongatus | |
Sequence of entity 1 (A), FASTA
>1C51_1 PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAA) (chains A)
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Sequence of entity 2 (B), FASTA
>1C51_2 PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAB ) (chains B)
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXX
Sequence of entity 3 (C), FASTA
>1C51_3 PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAC) (chains C)
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
Sequence of entity 4 (D), FASTA
>1C51_4 PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAD) (chains D)
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXX
Sequence of entity 5 (E), FASTA
>1C51_5 PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAE) (chains E)
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXX
Sequence of entity 6 (F), FASTA
>1C51_6 PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAF) (chains F)
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Sequence of entity 7 (K), FASTA
>1C51_7 PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAK) (chains K)
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXX
Sequence of entity 8 (L), FASTA
>1C51_8 PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAL) (chains L)
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Ligands and cofactors
| ID | Name | Formula | Copies |
|---|
| CLA | Chlorophyll a | C55 H72 Mg N4 O5 | 72 |
| PQN | Phylloquinone | C31 H46 O2 | 2 |
| SF4 | Iron/sulfur cluster | Fe4 S4 | 3 |
Primary citation
Photosystem I, an improved model of the stromal subunits PsaC, PsaD, and PsaE. Klukas, O., Schubert, W.D., Jordan, P. et al. J Biol Chem (1999) 274:7351-7360. DOI 10.1074/jbc.274.11.7351 · PubMed
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