The Gene at 1q32 Has a Name: IRF6, From DNA to Protein
Take the reading one piece at a time. For each piece: read it once, underline the sentence that says what happens, then look up any word in the list. Tap a word to see its definition.
Piece 1 of 2
Kondo et al. searched the 1q32 region in families with Van der Woude syndrome and found mutations in ONE gene, IRF6, in 46 unrelated VWS families, plus distinct mutations in 13 families with the more severe popliteal pterygium syndrome. They also checked where the gene is switched on in the embryo: IRF6 messenger RNA was high along the medial edge of the fusing palate, the exact tissue that must seal for a palate to close, plus tooth buds, hair follicles, skin, and genitalia. So the gene at 1q32 is IRF6, and it is active in precisely the tissue that fails in a cleft.
Piece 2 of 2
Every gene is a DNA recipe the cell reads in two steps. Transcription copies the DNA gene into messenger RNA (mRNA), a working copy that leaves the nucleus. Translation then has the ribosome read the mRNA and build a chain of amino acids, the protein. The finished IRF6 protein is 467 amino acids long and is a transcription factor: its job is to bind DNA and switch OTHER genes on or off. It has a DNA-binding part and a protein-partner part (UniProt O14896). In the embryo's palate, IRF6 tells skin-surface cells when to stop dividing and finish maturing so the palate shelves can fuse.
Reading the Research
- Skim the title and abstract first to get the gist.
- Circle the one sentence that states the main claim.
- Box the evidence the authors give for that claim.
- Mark one sentence that confuses you, and move on.
Now put it together: In one or two sentences, say what this whole reading is telling you about Mateo. Then go back to the lesson and fill in the guided notes.