Finding. Focal adhesions run two different actin chemistries. DAAM1 formin builds the Tpm3.2 layer; Ena/VASP builds the α-actinin bundles. Kill DAAM1 and Tpm3.2 falls and adhesions will not disassemble. Kill Ena/VASP and adhesions will not mature and α-actinin leaves. The authors parked polymerases on mitochondria to sequester them. That is a method, not a mitochondrial result.
Why this paper matters
How a shared G-actin pool becomes chemically distinct filaments is a real cell-biology problem. Pairing a formin with one tropomyosin and Ena/VASP with α-actinin is a clean specification rule.
It is on this desk because the methods sentence says “mitochondrial-targeting.” Honesty is the brief: do not launder a cytoskeleton paper into OXPHOS.
What they actually measured
Genetic loss and mito-targeted polymerase sequestration; Tpm3.2 versus α-actinin layers; adhesion disassembly versus maturation phenotypes.
How to read the score
Mid sixties, and that is generous as mitochondrial content. Score 64. Confidence is high for the adhesion claim, irrelevant for mitochondria.
What to do with it
If you work on formins, tropomyosins, or adhesions, pull the pairing. If you work on mitochondria, note the tool and move on. The directional implication is polymerase identity specifies linear-actin chemistry at adhesions.