A0A2G9RZF1

DOMAIN ARCHITECTURE MISMATCH

Review rationale: The target sequence is a 156-residue single-CUB ORF from the fragmented 2017 bullfrog assembly, not a complete CUB-only paralog whose subfamily should be read as independent evidence for loss of ovochymase activity. The existing curated review and its OpenScientist core-function audit found that adjacent KV928989 ORFs reconstruct a tolloid-like CUB-EGF-CUB-CUB-EGF-CUB region and that the 2024 chromosome-level assembly encodes complete BMP-1 and TLL1 metalloproteases, so this accession is best treated as a fragment of an extracellular tolloid-family protease. The fertilization prediction is still incorrect for the sequence supplied to ProtNLM2: the ovochymase audit shows the short accession lacks any S1 serine-protease domain and the His-Asp-Ser triad required for the egg-envelope protease activity underlying GO:0007338. This is therefore a gene-model/input-sequence failure rather than paralogous transfer to a genuine stand-alone CUB protein.

Review rationale: The sequence contains a nearly complete CUB domain at residues 31-147, and the comparative analysis defining CUB domains places this module in extracellular proteins with diverse functions. The existing curated review also accepts extracellular region for the draft fragment because a CUB domain from a tolloid-family protease is expected to act extracellularly. The focused ovochymase audit nevertheless found no signal-peptide confirmation for the exact 156-residue UniProt entry, and the TrEMBL record has no FT SIGNAL feature. The broad extracellular-region prediction is therefore plausible and aligned with the main review's location inference, but still UNC for the exact short accession rather than confirmed from an experimentally supported mature product.