A protein complex that catalyzes the formation of procollagen trans-4-hydroxy-L-proline and succinate from procollagen L-proline and 2-oxoglutarate, requiring Fe2+ and ascorbate. Contains two alpha subunits that contribute to most parts of the catalytic sites, and two beta subunits that are identical to protein-disulfide isomerase.
pyrroline-5-carboxylate reductase complex
respiratory chain complex II (succinate dehydrogenase)
respiratory chain complex III
respiratory chain complex IV
ribonucleoside-diphosphate reductase complex
ryanodine receptor complex
sarcosine oxidase complex
Sec62/Sec63 complex
signal peptidase complex
signal recognition particle receptor complex
SREBP-SCAP-Insig complex
superoxide dismutase complex
TAP complex
Tapasin-ERp57 complex
taurine dioxygenase complex
thioredoxin-disulfide reductase complex
translocon complex +
trimethylamine-N-oxide reductase (cytochrome c) complex