Study
Adaptations to high hydrostatic pressure
Somero, George N.
Annual Review of Physiology, 1992
Reviews how hydrostatic pressure affects biological molecules and how deep-sea organisms compensate, covering protein structure, membrane fluidity and the small molecules that offset pressure effects.
- Studied in
- Animalia
- Sample size
- review across deep-sea taxa
Pressure destabilises proteins and stiffens membranes because both processes involve volume changes. Deep-sea organisms compensate with pressure-insensitive protein variants, more fluid membrane lipids, and small organic molecules that stabilise proteins under pressure.
What it means
The authors' reading, and ours. Where they differ, that difference is the point.
How the authors put it
Depth limits are set by molecular physics rather than by anything anatomical, and adaptation to depth is chiefly biochemical.
How NatureHQ reads it
The record that reframes deep-sea pressure correctly. The intuitive picture is of an animal being crushed, which is wrong — a body of water is not compressible in the way a gas is. The real problem is that pressure changes the shapes of molecules, which is far less obvious and much more interesting.
- A 1992 review; the genomic work on pressure adaptation came later.
- Deep-sea animals are difficult to study alive, so much of the evidence is from isolated molecules.
What this study is used for on NatureHQ
One study can inform several subjects. Here is everywhere this one is cited.
Deep-sea pressure
A deep-sea animal is not being crushed. Water barely compresses, so a body of water is fine. The real problem is that pressure changes the shapes of proteins and stiffens membranes.
Deep-sea pressure
Fish stop at around 8,200 metres, and the reason was calculated before it was confirmed: deeper, the molecule protecting their proteins from pressure would be needed in osmotically impossible amounts.
Published by: Annual ReviewsPublished in an Annual Reviews journal.
doi.org/10.1146/annurev.ph.54.030192.003013
Checked against Crossref on 2026-09-28, and they agree on the title, the authors and the year.
NatureHQ summarises research in its own words and does not reproduce published text. Reviewed 2026-09-03.