PMID:18923393

The Phaeodactylum genome reveals the evolutionary history of diatom genomes.

The genome sequence of P. tricornutum strain CCAP 1055/1, from which HSP20A (PHATRDRAFT_35158) was predicted.

file:PHATC/B7FXQ8/B7FXQ8-deep-research-falcon.md

Deep research report on HSP20A (B7FXQ8) in P. tricornutum

Comprehensive literature synthesis on sHSP family biology and P. tricornutum thermal stress response systems.

file:PHATC/B7FXQ8/B7FXQ8-hypotheses/core-function-1-go-0051082/openscientist.md

OpenScientist hypothesis investigation - unfolded protein binding as core function of HSP20A

GO:0051082 (unfolded protein binding) is officially obsolete. Recommended replacement is GO:0044183 (protein folding chaperone), following precedent of 25 reviewed sHSPs in Swiss-Prot. B7FXQ8 has zero GO annotations in any database; only one of seven P. tricornutum sHSPs has any GO annotation.
All seven independent domain databases (CDD, InterPro, Pfam, PROSITE, PANTHER, SMART, Gene3D) classify B7FXQ8 as an sHSP. The IXI motif (IAI at position 150) is present, supporting oligomeric assembly capability.