Table 1

Comparison of numbers of protease genes in Arabidopsis and Populus. Families highlighted in bold are those that have been examined in most depth in this study.

PROTEASE CLASS
MEROPS FAMILY
FAMILY DESCRIPTION
Number of Genes in Arabidopsis
Number of Genes in Populus

Threonine
T1
Proteasome family
25
32

T2
Peptidase family T2
4
5

T3
gamma-glutamyltransferase family
4
3
Cysteine
C1
Papain-like
38
44

C12
ubiquitin C-terminal hydrolase family
3
3

C13
VPE
5
7

C14
Metacaspases
10
16

C15
pyroglutamyl peptidase I family
1
3

C19
ubiquitin-specific protease family
32
49

C26
gamma-glutamyl hydrolase family
5
4

C44
Peptidase family C44
8
10

C48
Ulp1endopeptidase family
77
13

C54
Aut2 peptidase family
3
3

C56
PfpI endopeptidase family
5
7

C65
Peptidase family C65
1
2
Serine
S1
Chymotrypsin family (Deg)
16
18

S8
Subtilisin family
65
72

S9
Prolyl oligopeptidase family
45
68

S10
Peptidase family S10
57
51

S12
D-Ala-D-Ala carboxypeptidase B family
1
1

S14
ClpP endopeptidase family
26
53

S16
Lon protease family
11
17

S26
Signal peptidase I family
20
24

S28
Peptidase family S28
7
18

S33
Peptidase family S33
51
68

S41
C-terminal processing peptidase family
3
4

S49
protease IV family (SppA)
1
3

S54
Rhomboid family
15
16

S59
Peptidase family S59
3
3
Metallo
M1
Peptidase family M1
3
8

M3
Peptidase family M3
4
5

M8
leishmanolysin family
1
1

M10
Peptidase family M10
5
6

M14
carboxypeptidase A family
2
4

M16
pitrilysin family
13
11

M17
leucyl aminopeptidase family
3
3

M18
Aminopeptidase I
2
3

M20
Peptidase family M20
13
18

M22
Peptidase family M22
2
4

M24
Peptidase family M24
12
16

M28
Aminopeptidase Y family
5
4

M38
Beta-aspartyl dipeptidase family
1
3

M41
FtsH endopeptidase family
12
18

M48
Ste24 endopeptidase family
3
5

M50
S2P protease family
4
5

M67
Peptidase family M67
9
13
Aspartic
A1
Pepsin-like proteases
59
74

A11
Copia transposon endopeptidase family
20
123

A22
presenilin family
8
14

TOTAL


723
955

García-Lorenzo et al. BMC Plant Biology 2006 6:30   doi:10.1186/1471-2229-6-30