Table 1. IRT1 interactants involved in intracellular trafficking or metal homeostasis.

Among the 142 putative IRT1 interacting-proteins identified by co-IP combined with mass spectrometry, we present in this table proteins that are associated to intracellular trafficking or metal homeostasis according to gene ontogeny annotations from The Arabidopsis Information Resource. The maximum number of unique peptides identified for each protein from the two independent experiments (see Supplemental Dataset S1) is indicated.

Category	Accession	Protein Name	Maximum Number of Unique Peptides
Intracellular Trafficking	AT3G11130	Clathrin H chain	24
	AT1G04820	Tubulin alpha-4 chain	6
	AT1G29310	SecY protein transport family protein	2
	AT5G09810	Actin 7	4
	AT4G33650	Dynamin-related protein 3A	2
	AT3G63460	SEC31b, COPII component	6
	AT4G18800	RAB GTPase homolog A1D	3
	AT1G62020	Coatomer alpha subunit, COPI component	2
	AT4G31480	Coatomer beta subunit, COPI component	2
	AT4G17530	RAB GTPase homolog 1C	2
	AT1G49240	Actin 8	2
	AT5G05010	Clathrin adaptor complexes medium subunit family protein	2
	AT2G21390	Coatomer, alpha subunit, COPI component	2
	AT5G44340	Tubulin beta chain 4	2
	AT2G30050	SEC13a, COPII component	2
Metal Homeostasis	AT4G30190	H+-ATPase 2	13
	AT4G31940	Cytochrome P450/CYP82C4	3
	AT3G13610	F6′H1	2
	AT4G27860	VIT family protein	11
	AT5G24290	VIT family protein	8
	AT2G01530	MLP-like protein 329	5
	AT1G59870	Pleiotropic drug resistance 8/Penetration 3	4
	AT1G01580	Ferric reduction oxidase 2	3
	AT1G07890	Ascorbate peroxidase 1	2