Table 1 Detected candidate proteins interacting with SPL13 by IPMS analysis

50S ribosomal protein L22

Early stages of 50S ribosomal protein assembly

18

4

7

60s ribosomal protein L11

Biogenesis of 60S ribosomal subunits

49.72

6

11

Arginine biosynthesis bifunctional protein

Involved in the cyclic version of arginine biosynthesis

26.72

7

21

Beta-xylosidase/alpha-L-arabinofuranosidase

Releases xylose and arabinose from cell walls

25.32

15

30

Cafeic acid 3-O-methlyltransferase (COMT1)

Catalyzes the conversion of caffeic acid to ferulic acid and of 5-hydroxyferulic acid to sinapic acid.

17.81

6

31

Cell division control protein 2 homolog 1

control of the eukaryotic cell cycle

17.87

4

11

Chalcone synthase 1

naringenin-chalcone or chalcone biosynthesis

15.17

5

14

Chalcone synthase 2

31.62

9

38

Chalcone synthase 4

28.53

8

34

Cyclic beta-(1,2)-glucan synthase

biosynthesis of cyclic beta-(1,2)-glucan

15.11

29

86

Dihydroflavonol 4-reductase

anthocyanin biosynthesis

33.18

6

12

Eukaryotic translation initiation factor 5A-1

mRNA-binding protein involved in translation elongation

32.3

3

32

Glutamate synthasee [NADH] amyloplastic

assimilation of symbiotically fixed nitrogen into amino acids

19.51

30

99

Glutamine synthetase cytosolic isozyme

homeostatic control of glutamine synthesis

16.85

4

9

Glutamine synthetase leaf isozyme, chloroplastic

Re-assimilation of the ammonia generated by photorespiration

14.95

6

15

Glycogen synthase kinase-3 homolog − 1

Brassinosteroids signaling and abiotic stress response

21.41

6

11

Glycogen synthase kinase-3 homolog − 2

25.3

7

94

Glycogen synthase kinase-3 homolog − 3

37.23

11

27

Isoflavone reductase, IFR

Reduces achiral isoflavones to chiral isoflavanones

13.52

4

5

Long-distance movement protein

facilitate the cell-to-cell movement

17.93

3

3

Malate dehydrogenase, chloroplastic

Catalyzes a reversible NAD-dependent dehydrogenase reaction involved in central metabolism

16.87

3

3

Methylthioribose-1-phosphate isomerase

Catalyzes methylthioribose-1-phosphate (MTR-1-P) into methylthioribulose-1-phosphate (MTRu-1-P) interconversion

38.14

11

15

Mitogen-activated protein kinase homolog

mitogenic induction of symbiotic root nodules

21.19

6

32

Nodulation protein D1

Regulates other nodulation proteins

15.2

3

3

Nodulation protein E

synthesize NOD factor fatty acyl chain

26.68

7

9

Nodulin-25

development and function of nodules

19.51

3

6

Phenylalanine ammonia-lyase

catalyzes the deamination of phenylalanine to cinnamate and ammonia

21.38

12

21

Phosphoenolpyruvate carboxylase

catalyzes the addition of bicarbonate to phosphoenolpyruvate

17.08

11

16

Polygalacturonase

depolymerization of pectates

15.44

6

29

Replication protein 1A

stabilizes single-stranded DNA intermediates, that form during DNA replication or upon DNA stress.

33.13

25

170

Ribulose bisphosphate carboxylase large chain

Catalyzes the carboxylation of D-ribulose 1,5-bisphosphate and oxidative fragmentation of the pentose substrate

24.05

12

21

Ribulose bisphosphate carboxylase small chain

Catalyzes the carboxylation of D-ribulose 1,5-bisphosphate and oxidative fragmentation of the pentose substrate

46.67

7

34

RNA-directed RNA polymerase

catalyses synthesis of the RNA strand complementary to a given RNA template

15.14

9

34

RNA-directed RNA polymerase 2a

required for cytoplasmic and chromatin RNA silencing pathways

16.91

9

13

Serine/threonin-protein phosphatase PP1

essential for cell division and glycogen metabolism by dephosphorylating substrates

29.6

8

97

Serine/threonin-protein phosphatase PP2A

Dephosphorylates and activates the actin-depolymerizing factor ADF1

18.85

3

5

Sucrose synthase

Sucrose-cleaving enzyme that provides UDP-glucose and fructose

15.65

8

31

Tyrosine recombinase XerC

Catalyze the cutting and rejoining of the recombining DNA molecules

15.72

3

3

Vacuolar membrane protease

vacuolar sorting and osmoregulation

21.96

14

45

Vacuolar protein sorting/targeting protein 10

sorting receptor in the Golgi compartment required for the intracellular sorting and delivery of soluble vacuolar proteins

18.45

22

67