Table 1.

Correspondence of ESTHER families with the Arpigny and Jaeger classification

ESTHER families	Arpigny and Jaeger families
Bacterial_lipase	Family_I
Bacterial_lip_FamI.1	Family I.1
Bacterial_lip_FamI.2	Family_I.2
Bacterial_lip_FamI.3	Family_I.3
Lipase_2	Family_I.4
Bacterial_lip_FamI.5	Family_I.5
Bacterial_lip_FamI.6	Family_I.6
Lipase_2	Family_I.7
Not α/β-hydrolase SGNH	Family_II
Polyesterase-lipase-cutinase	Family_III
Hormone-sensitive_lipase_like	Family_IV (25,26)
Hormone-sensitive_lipase_like_1	Family_IV
ABHD6-Lip	Family_V.1
Carboxymethylbutenolide_lactonase	Family_V.2
UCP031982	Family_V.3 (30)
LYsophospholipase_carboxylesterase	Family_VI
Carb_B_Bacteria	Family_VII
(not α/β-hydrolase β-lactamase)	Family_VIII
PHAZ7_phb_depolymerase	Family_IX (31)
Bacterial_EstLip_FamX	Family_X.1 (32)
Fungal-Bact_LIP	Family_X.2 (33)
Lipase_3	Family_XI (34)
Bact_LipEH166_FamXII	Family_XII (35)
CarbLipBact	Family_XIII (32)
PC-sterol_acyltransferase	Family_XIV (36)
Duf_3089	Family_XV (37,38)
Bacterial_Est97	Family_XVI (39)

The original A & J classification included only eight families (27). Two families contain enzymes corresponding to a different fold. In 2003, the first family was subdivided in seven subfamilies (28). Families IX to XIV were added recently (31–39). Here, we added family XV and subdivided family V.