PRotein Ontology (PRO) Release 46.0 (16-Jun-2015)

There are 223847 PRO terms in the Protein Ontology.
   55 terms are in the 'external' category.
   378 terms are in the 'family' category.
  23580 terms are in the 'gene' category.
  8311 terms are in the 'sequence' category.
  6670 terms are in the 'modification' category.
   215 terms are in the 'complex' category.
   20 terms are in the 'organism-family' category.
 114741 terms are in the 'organism-gene' category.
  67574 terms are in the 'organism-sequence' category.
  1632 terms are in the 'organism-modification' category.
   374 terms are in the 'organism-complex' category.
   79 terms are in the 'union' category.
2390 terms have some kind of annotation, codifying the information from 1595 papers.
  4218 connections to GO (1586 PRO terms).
   292 connections to MOD (255 PRO terms).
   620 connections to Pfam (373 PRO terms).
   338 connections to SO (317 PRO terms).
   349 annotations of a phenotype (342 PRO terms).

The ontology includes a subset of terms from other ontologies and resources that are used for logical definitions.

_Current changes_

None

_Forthcoming changes_

1) Starting on Release 47 the format for the PAF file will change. Columns number 15 (Protein_region) and 16 (Modified_residue(s), MOD_ID) will be removed, as all the information about the region and modification are now contained in the ontology file. 

2) Continue to add shorthand labels to terms.

3) Resolve names and synonym duplicates.