Polar auxin transport (Arabidopsis thaliana)

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1-6, 8-11, 13AUX Auxin influx transportersCELLPIN Auxin Efflux transporterspH = 5.0H+ ATPasePIN3indole-3-acetic acidH+indole-3-acetatePIN27PIN4PIN1PIN7indole-3-acetateH+H+CELLLAX1LAX3LAX2indole-3-acetic acidindole-3-acetateH+indole-3-acetate(H+)x2(H+)x2H+ ATPaseH+pH = 7.0pH = 7.0Plasma membranePlasma membraneCytosolCytosolpH = 5.0Cell wallCell wallAuxin (IAA) transport directionAUX12, 12


Description

Polar auxin transport pathway of Arabidopsis. Even though we have shown a representative diagram of influx and efflux proteins on different but adjacent cells, the auxin influx and efflux transport proteins when present in the same cell, are often located in the plasma membrane of cell's opposite side or on the sides (left/right). All the different paralogs of influx and efflux proteins may not be present in the same cell. Often their expression and localization is tissue, cell, organ and development stage specific. This helps in directing the flow of auxin towards 'auxin maxima' sites in plant organs and cells as needed. In some cases auxin can permeate through the plasma membrane. The Arabidopsis gene products PIN5, PIN6 and PIN8 were removed from the pathway since they are known to be involved in intracellular auxin transport rather than the intercellular auxin transport.

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Bibliography

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  1. Belin C, Megies C, Hauserová E, Lopez-Molina L; ''Abscisic acid represses growth of the Arabidopsis embryonic axis after germination by enhancing auxin signaling.''; Plant Cell, 2009 PubMed Europe PMC Scholia
  2. Yang Y, Hammes UZ, Taylor CG, Schachtman DP, Nielsen E; ''High-affinity auxin transport by the AUX1 influx carrier protein.''; Curr Biol, 2006 PubMed Europe PMC Scholia
  3. ''''; , PubMed Europe PMC Scholia
  4. Bennett T; ''PIN proteins and the evolution of plant development.''; Trends Plant Sci, 2015 PubMed Europe PMC Scholia
  5. Okada K, Ueda J, Komaki MK, Bell CJ, Shimura Y; ''Requirement of the Auxin Polar Transport System in Early Stages of Arabidopsis Floral Bud Formation.''; Plant Cell, 1991 PubMed Europe PMC Scholia
  6. Ding Z, Wang B, Moreno I, Dupláková N, Simon S, Carraro N, Reemmer J, Pěnčík A, Chen X, Tejos R, Skůpa P, Pollmann S, Mravec J, Petrášek J, Zažímalová E, Honys D, Rolčík J, Murphy A, Orellana A, Geisler M, Friml J; ''ER-localized auxin transporter PIN8 regulates auxin homeostasis and male gametophyte development in Arabidopsis.''; Nat Commun, 2012 PubMed Europe PMC Scholia
  7. Müller A, Guan C, Gälweiler L, Tänzler P, Huijser P, Marchant A, Parry G, Bennett M, Wisman E, Palme K; ''AtPIN2 defines a locus of Arabidopsis for root gravitropism control.''; EMBO J, 1998 PubMed Europe PMC Scholia
  8. de Jong M, George G, Ongaro V, Williamson L, Willetts B, Ljung K, McCulloch H, Leyser O; ''Auxin and strigolactone signaling are required for modulation of Arabidopsis shoot branching by nitrogen supply.''; Plant Physiol, 2014 PubMed Europe PMC Scholia
  9. Liu C, Xu Z, Chua NH; ''Auxin Polar Transport Is Essential for the Establishment of Bilateral Symmetry during Early Plant Embryogenesis.''; Plant Cell, 1993 PubMed Europe PMC Scholia
  10. Kleine-Vehn J, Dhonukshe P, Swarup R, Bennett M, Friml J; ''Subcellular trafficking of the Arabidopsis auxin influx carrier AUX1 uses a novel pathway distinct from PIN1.''; Plant Cell, 2006 PubMed Europe PMC Scholia
  11. Mravec J, Skůpa P, Bailly A, Hoyerová K, Krecek P, Bielach A, Petrásek J, Zhang J, Gaykova V, Stierhof YD, Dobrev PI, Schwarzerová K, Rolcík J, Seifertová D, Luschnig C, Benková E, Zazímalová E, Geisler M, Friml J; ''Subcellular homeostasis of phytohormone auxin is mediated by the ER-localized PIN5 transporter.''; Nature, 2009 PubMed Europe PMC Scholia
  12. Fischer U, Ikeda Y, Ljung K, Serralbo O, Singh M, Heidstra R, Palme K, Scheres B, Grebe M; ''Vectorial information for Arabidopsis planar polarity is mediated by combined AUX1, EIN2, and GNOM activity.''; Curr Biol, 2006 PubMed Europe PMC Scholia
  13. Bender RL, Fekete ML, Klinkenberg PM, Hampton M, Bauer B, Malecha M, Lindgren K, A Maki J, Perera MA, Nikolau BJ, Carter CJ; ''PIN6 is required for nectary auxin response and short stamen development.''; Plant J, 2013 PubMed Europe PMC Scholia

History

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CompareRevisionActionTimeUserComment
124695view09:15, 25 November 2022EgonwH+ ATPase is a protein
118621view09:12, 31 May 2021FinterlyFixed Ensembl linkout
117250view09:59, 19 May 2021EweitzModified title
107044view14:13, 17 September 2019MaintBotChEBI identifier normalization
88332view15:52, 1 August 2016FehrhartOntology Term : 'transport pathway' added !
88331view15:52, 1 August 2016FehrhartOntology Term : 'hormone signaling pathway' added !
87354view09:29, 22 July 2016MaintBotadded missing graphids
85215view20:20, 29 April 2016Khanspersreplaced unconnected arrow with graphical arrow
84931view17:40, 1 April 2016PjaiswalQuick edit to datanode annotation or property
84926view17:29, 1 April 2016PjaiswalQuick edit to datanode annotation or property
84919view16:42, 1 April 2016PjaiswalAdded new reference PMID:26051227
84903view19:17, 31 March 2016PjaiswalPIN5, PIN6 and PIN8 were removed from the pathway since they are known to be involved in intracellular Auxin transport, instead of the intercellular auxin transport.
84902view19:15, 31 March 2016PjaiswalModified description
84901view19:12, 31 March 2016PjaiswalPIN5, PIN6 and PIN6 were removed from the pathway since they are known to be involved in intracellular Auxin transport, instead of the intercellular auxin transport.
84900view19:03, 31 March 2016PjaiswalPeriodical save, work in progress
80333view21:38, 5 June 2015Pjaiswalupdated regrouping and sizes
80332view21:36, 5 June 2015Pjaiswaldeleted empty lit. reference
80331view21:35, 5 June 2015PjaiswalModified description
80330view21:33, 5 June 2015PjaiswalNew pathway

External references

DataNodes

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NameTypeDatabase referenceComment
(H+)x2MetaboliteCHEBI:24636 (ChEBI) Synonym: proton
AUX1GeneProductAT2G38120 (Ensembl Plants) Auxin influx transporter
H+ ATPasePlasma mambrane H+ ATPase
H+MetaboliteCHEBI:24636 (ChEBI) Synonym: proton
LAX1GeneProductAT5G01240 (Ensembl Plants) Auxin influx transporter
LAX2GeneProductAT2G21050 (Ensembl Plants) Auxin influx transporter
LAX3GeneProductAT1G77690 (Ensembl Plants) Auxin influx transporter
PIN1GeneProductAT1G73590 (Ensembl Plants) Auxin efflux carrier family protein
PIN2GeneProductAT5G57090 (Ensembl Plants) Auxin efflux carrier family protein
PIN3GeneProductAT1G23080 (Ensembl Plants) Auxin efflux carrier family protein
PIN4GeneProductAT5G15100 (Ensembl Plants) Auxin efflux carrier family protein
PIN7GeneProductAT1G70940 (Ensembl Plants) Auxin efflux carrier family protein
indole-3-acetateMetaboliteCHEBI:30854 (ChEBI) Synonym: IAA(-) ion
indole-3-acetic acidMetaboliteCHEBI:16411 (ChEBI) Synonym: IAA

Annotated Interactions

No annotated interactions

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