3.A.1.204.8 The epidermal plasma membrane cuticular lipid (wax) exporters, ABCG11/ABCG11 and ABCG11/ABCG12;
ABCG11 is also called Wbc11; Desperado (DSO); COF1; PEL1. ABCG12 is also called CER5, WBC12 and D3 (Panikashvili and Aharoni 2008). Required for the cuticle and pollen coat development by controlling
cutin and possibly wax transport to the extracellular matrix. Involved in
developmental plasticity and stress responses (Bird et al. 2007). ABCG11 can traffic to the plasma membrane in the absence of ABCG12 and can form flexible dimers. By contrast, ABCG12 was retained in the endoplasmic reticulum in the absence of ABCG11, indicating that ABCG12 can only form dimers with ABCG11 in the plasma membrane of epidermal cells. Some ABCG proteins may be promiscuous, having multiple partnerships,
while others may form obligate heterodimers for specialized
functions (McFarlane et al. 2010). Othere designations include: White-brown complex homolog protein 11, AtWBC11, of
703 aas with 6 TMSs (C-terminal) in a 5 + 1 TMS arrangement. It is
involved in cuticle development and prevention of organ fusion (Luo et al. 2007). AbcG transporters are required for export of diverse cuticular lipids (McFarlane et al. 2010).
It is required for cuticle, root suberin and pollen coat development by
controlling cutin and maybe wax transport to the extracellular matrix (Le Hir et al. 2013).
It is also involved in developmental plasticity and stress
responses. Together with ABCG9 and ABCG14, it is required for vascular
development by regulating lipid/sterol homeostasis (Le Hir et al. 2013), and may be a transporter of lignin precursors during tracheary element differentiation (Takeuchi et al. 2018).
It is expressed in seedlings, roots, stems, leaves, flowers, and
siliques, mostly in epidermis, trichomes, vasculatures and developing
tissues (Le Hir et al. 2013).
|
Accession Number: | Q8RXN0 |
Protein Name: | ABC transporter G family member 11 |
Length: | 703 |
Molecular Weight: | 78413.00 |
Species: | Arabidopsis thaliana (Mouse-ear cress) [3702] |
Number of TMSs: | 7 |
Location1 / Topology2 / Orientation3: |
Cell membrane1 / Multi-pass membrane protein2 |
Substrate |
wax |
---|
1: MEIEASRQQT TVPVSVGGGN FPVGGLSPLS EAIWREKAPT EFVGDVSARL TWQDLTVMVT
61: MGDGETQNVL EGLTGYAEPG SLTALMGPSG SGKSTMLDAL ASRLAANAFL SGTVLLNGRK
121: TKLSFGTAAY VTQDDNLIGT LTVRETIWYS ARVRLPDKML RSEKRALVER TIIEMGLQDC
181: ADTVIGNWHL RGISGGEKRR VSIALEILMR PRLLFLDEPT SGLDSASAFF VTQTLRALSR
241: DGRTVIASIH QPSSEVFELF DRLYLLSGGK TVYFGQASDA YEFFAQAGFP CPALRNPSDH
301: FLRCINSDFD KVRATLKGSM KLRFEASDDP LEKITTAEAI RLLVDYYHTS DYYYTAKAKV
361: EEISQFKGTI LDSGGSQASF LLQTYTLTKR SFINMSRDFG YYWLRLLIYI LVTVCIGTIY
421: LNVGTSYSAI LARGSCASFV FGFVTFMSIG GFPSFVEDMK VFQRERLNGH YGVAAFVIAN
481: TLSATPFLIM ITFISGTICY FMVGLHPGFT HYLFFVLCLY ASVTVVESLM MAIASIVPNF
541: LMGIIIGAGI QGIFMLVSGF FRLPNDIPKP FWRYPMSYIS FHFWALQGQY QNDLRGLTFD
601: SQGSAFKIPG EYVLENVFQI DLHRSKWINL SVILSMIIIY RIIFFIMIKT NEDVTPWVRG
661: YIARRRMKQK NGTQNTTVAP DGLTQSPSLR NYIATRTDGA RRW