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Table 3 Aromatic/arginine filter of PpMIPs and MIPs of the XIP subfamily

From: Unexpected complexity of the Aquaporin gene family in the moss Physcomitrella patens

 

NPA motifs

Ar/R selectivity filtera

MIP protein(s)b

Loop B

Loop E

H2

H5

LE1

LE2

Alt. H5c

PpPIPs

NPA

NPA

F

H

T

R

 

PpTIPs

NPA

NPG

H

I

A

R

 

PpNIP3.1

NPA

NPV

A

I

A

R

 

PpNIP5s

NPA

NPA

F

A

A

R

 

PpNIP6.1

NPA

NPM

G

V

A

R

 

PpSIPs

NPT

NPA

V

V

P

N

 

PpGIP1.1

NPA

NPA

F

V

P

R

 

PpHIP1.1

NPA

NPA

H

H

A

R

 

PpXIP1.1

NPC

NPA

Q

A

A

R

A

PpXIP1.2

NPS

NPA

Q

I

A

R

Q

DN837617

NPI

NPA

L

Q

A

R

S

DY275505

NPL

NPA

V

V

A

R

T

AM455454.1

NPV

NPA

V

V

A

R

T

557139

NPI

NPA

V

V

A

R

T

829126

NPI

NPA

V

V

A

R

T

759781

NPI

NPA

V

V

A

R

T

EG666650

SPT

NPA

V

V

V

R

T

DR936893 DT742029

NPT

NPS

V

V

V

R

S

CK746370 D T60037

NPI

NPA

V

I

V

R

G

767334

NPL

NPA

A

V

A

R

T

CK295158

NPV

NPA

I

V

A

R

T

BT014197

NPV

NPA

I

V

A

R

T

AM455454.2

NPI

NPA

I

V

A

R

T

821124

NPA

NPA

I

V

V

R

T

EG656577

NPV

NPA

I

V

V

R

T

CO092422

NPV

NPA

I

V

V

R

T

XM_639170

NPS

NPA

H

S

F

R

I

  1. a The ar/R filter is defined by four amino acid residues: one in helix 2, one in helix 5 and two in loop E b The PpMIPs are identified with their proposed names and the other MIPs are identified by their GenBank accession numbers c Alternative residue at H5 position due to alignment of conserved glycines in helix 5, however this also introduces two extra amino acids between helix 5 and the second NPA box
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BMC Plant Biology

ISSN: 1471-2229

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