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Table 1 Characteristics (domains and motifs) of the Micrasterias denticulata expansin-resembling proteins

From: Transcriptional analysis of cell growth and morphogenesis in the unicellular green alga Micrasterias(Streptophyta), with emphasis on the role of expansin

Characteristic

MdEXP1

MdEXP2

MdEXP3

MdEXP4

Signal peptide

1-24

1-23

1-19

1-24

GH45 domain

No

39-180

52-211

No

Eight conserved cysteines

Yes

Yes

Yes

Yes

GGACGY motif

GGsCGY

GGsCGf

GGsCGY

GGsCGY

GxxCGxCF/Y motif

Yes

Yes

Yes

Yes

Y/FRRVPC motif

IYAVSC

FTQVPC

VTRVPC

VYAAGC

Catalytic site key residues

No

1 A

1 A

No

DPBB_1 domain

51-132

56-136; 302-385

82-161

51-132

Pollen_allerg_1 domain

144-223

147-226

172-253

No

Four conserved tryptophan (W) residues (* structurally related residues)

2(W) 1(F*) 1(Y*)

2(W) 1(F*) 1(Y*)

2(W) 2(Y*)

No

HATFYG motif (A)

No

No

No

No

α-insertion (A)

Yes

Yes

Yes

Yes

β-insertion (B)

No

No

No

No

HFDL motif (A, B)

Only L

Only L

Only L

Only L

CDRC motif (LA)

No

No

No

No

Long carboxy terminal extension (LA)

No

Yes

No

No

  1. When a domain is present, its position is given (starting from the first methionine). A, unique characteristic of the EXPA family; B, unique characteristic of the EXPB family; LA, unique characteristic of the EXLA family; LB, unique characteristic of the EXLB family