Number of ATPs produced per glucose molecule in a combination of respiration and fermentation in fibroblast

Range ≈16 ATP/glucose
Organism Human Homo sapiens
Reference Flamholz A, Phillips R, Milo R. The quantified cell. Mol Biol Cell. 2014 Nov 5 25(22):3497-500. doi: 10.1091/mbc.E14-09-1347. p.3499 right column bottom paragraphPubMed ID25368429
Comments "Fortunately, recent measurements of metabolic fluxes in active human fibroblasts allow [investigators] to check [them]selves a second time. These consistency checks are a critical part of quantitative biologists’ toolkit as they test whether different estimates are compatible. Human fibroblasts were measured to consume ˜1 nmol glucose per µg protein per hour (BNID 111474). Protein is ˜10% of the wet weight of a human cell (BNID 109576, 110723), and so, using a characteristic cell mass of 3 ng (BNID 103720, 108979), [investigators] estimate that a single fibroblast contains ˜0.3 ng = 3 × 10^-4µg of protein. From the flux measurements, it appears that fibroblasts metabolize about one-half of their glucose uptake aerobically (producing ˜30 ATP/glucose) and the other one-half fermentatively (producing lactate and 2 ATP/glucose: BNID 103351), giving a net ATP yield of ˜16 ATP/glucose."
Entered by Uri M
ID 111475