I have 2 questions regarding the naming of secondary structure elements ($\alpha$-helix and $\beta$-sheets), like helix C or sheet 2, which are often used in publications.
Example protein: CYP1A2
PDB code: 2HI4
DOI of publication: 10.2210/pdb2HI4/pdb
Now my questions:
- Who assigns the characters and numbers to the helices and sheets? The authors of the paper where the structure is published (considering possible homologues or canonical folds)? Some institution?
- Is there a database/website where one can easily look up the right naming? I could not find any such information on RCSB webpage's entries. Or is it always necessary to look at the publication?
I read that there would be a 'canonical P450 fold' - but I could not find any naming conventions.