Lineage for Family c.44.3.1: PIWI domain N-terminal
- Root: SCOPe 2.06
Class c: Alpha and beta proteins (a/b) [51349] (148 folds) 
Fold c.44: Phosphotyrosine protein phosphatases I-like [52787] (3 superfamilies)
3 layers: a/b/a; parallel beta-sheet of 4 strands, order 2134
Superfamily c.44.3: PIWI domain N-terminal-like [310581] (2 families) 
Family c.44.3.1: PIWI domain N-terminal [310609] (4 proteins)
PubMed 15565169 notes that both halves of PIWI are usually a single evolutionary unit; however, fragments have been characterized separately. The C-terminal half is (c.55.3.10)
Proteins:
Argonaute homologue Aq_1447 [310684] (1 species) Species Aquifex aeolicus [TaxId:63363] [310901] (4 PDB entries)
Argonaute homologue PF0537 [310686] (1 species) Species Pyrococcus furiosus [TaxId:2261] [310903] (3 PDB entries)
Argonaute-2 [310718] (1 species)
Pfam PF16487Species Human (Homo sapiens) [TaxId:9606] [310964] (12 PDB entries)
Hypothetical protein AF1318 [310688] (1 species) Species Archaeoglobus fulgidus [TaxId:2234] [310905] (3 PDB entries)
More info for Family c.44.3.1: PIWI domain N-terminal
Timeline for Family c.44.3.1: PIWI domain N-terminal:
- Family c.44.3.1: PIWI domain N-terminal is new in SCOPe 2.06-stable
- Family c.44.3.1: PIWI domain N-terminal appears in SCOPe 2.07
- Family c.44.3.1: PIWI domain N-terminal appears in the current release, SCOPe 2.08