Table 1 Significantly upregulated proteins during storage (low in control cells).

From: Improvement of Storage Medium for Cultured Human Retinal Pigment Epithelial Cells Using Factorial Design

Gene Symbol

Gene Description

Biological function

ACOX1

Peroxisomal acyl-coenzyme A oxidase 1

Desaturation of acyl-CoAs to 2-trans-enoyl-CoAs

ALDH18A1

Delta-1-pyrroline-5-carboxylate synthase

Synthesis of proline, ornithine and arginine

AP2A1

AP-2 complex subunit alpha-1

Component of the adaptor protein complex 2; clathrin-dependent endocytosis

ARHGAP1

Rho GTPase-activating protein 1

GTPase activator for Rho, Rac and Cdc42

ARMT1

Protein-glutamate O-methyltransferase

Formation of gamma-glutamyl methyl ester residues

BCLAF1

Bcl-2-associated transcription factor 1

Death-promoting transcriptional repressor

DAZAP1

DAZ-associated protein 1

RNA-binding protein; possibly required in spermatogenesis

DBI

Acyl-CoA-binding protein

Possible intracellular carrier of acyl-CoA esters

DBT

Lipoamide acyltransferase component of branched-chain alpha-keto acid dehydrogenase complex, mitochondrial

Conversion of alpha-keto acids to acyl-CoA and CO2

DDX23

Probable ATP-dependent RNA helicase DDX23

Pre-mRNA splicing

DNAJC3

DnaJ homolog subfamily C member 3

Unfolded protein response during endoplasmic reticulum stress

DSP

Desmoplakin

Anchoring of intermediate filaments to desmosomes

EIF6

Eukaryotic translation initiation factor 6

Prevents the association of the 60S ribosomal subunit with the 40S subunit

EPM2AIP1

EPM2A-interacting protein 1

Unknown

EZR

Ezrin

Connection of cytoskeletal structures to the plasma membrane; formation of microvilli

FARSB

Phenylalanine–tRNA ligase beta subunit

Regulatory tRNA ligase beta subunit

FBN2

Fibrillin-2

Component of extracellular calcium-binding microfibrils; regulation of elastic fibers

FLOT1

Flotillin-1

Possible scaffolding protein within caveolar membranes; formation of caveolae

FUCA2

Plasma alpha-L-fucosidase

Hydrolyzation of glycoproteins

GATM

Glycine amidinotransferase, mitochondrial

Synthesis of creatine precursor guanidinoacetate

GDAP2

Ganglioside-induced differentiation-associated protein 2

Unknown

HIST1H4A

Histone H4

Core nucleosome component

HNRNPD

Heterogeneous nuclear ribonucleoprotein D0

RNA-binding protein

HNRNPH1

Heterogeneous nuclear ribonucleoprotein H

Pre-mRNA processing

HNRNPM

Heterogeneous nuclear ribonucleoprotein M

Pre-mRNA binding protein

HSD17B2

Estradiol 17-beta-dehydrogenase 2

Interconversion of testosterone and androstenedione; estradiol and estrone

KIAA1468

LisH domain and HEAT repeat-containing protein KIAA1468

Unknown

KTN1

Kinectin

Kinesin-driven vesicle motility

LRPPRC

Leucine-rich PPR motif-containing protein, mitochondrial

Nuclear and mitochondrial RNA metabolism

LRRC8A

Volume-regulated anion channel subunit LRRC8A

Essential component of the volume-regulated anion channel

LRSAM1

E3 ubiquitin-protein ligase LRSAM1

Regulation of signaling pathways, cell adhesion, self-ubiquitylation, and cargo sorting during receptor endocytosis

MRPL28

39S ribosomal protein L28, mitochondrial

Component of the 39S mitochondrial ribosome subunit

MRRF

Ribosome-recycling factor, mitochondrial

Release of ribosomes from mRNA

MYH9

Myosin-9

Cytokinesis, cell shape, secretion

MYO7A

Unconventional myosin-VIIa

Intracellular movements

NUDT19

Nucleoside diphosphate-linked moiety X motif 19

Hydrolysis various CoA esters

NUP155

Nuclear pore complex protein Nup155

Component of the nuclear pore complex

PDHB

Pyruvate dehydrogenase E1 component subunit beta, mitochondrial

Conversion of pyruvate to acetyl-CoA and CO2

POLR2E

DNA-directed RNA polymerases I, II, and III subunit RPABC1

Subunit of RNA polymerase II

PRCP

Lysosomal Pro-X carboxypeptidase

Cleavage of C-terminal amino acids

PRDX2

Peroxiredoxin-2

Involved in redox regulation of the cell

PRDX3

Thioredoxin-dependent peroxide reductase, mitochondrial

Involved in redox regulation of the cell

PRKCSH

Glucosidase 2 subunit beta

Beta-subunit of glucosidase II, an ER glycan-processing enzyme

PRKDC

DNA-dependent protein kinase catalytic subunit

DNA double-strand break repair

PRPF8

Pre-mRNA-processing-splicing factor 8

Assembly of spliceosomal proteins

PRPS2

Ribose-phosphate pyrophosphokinase 2

Synthesis of phosphoribosylpyrophosphate (PRPP), essential for nucleotide synthesis

PTCD3

Pentatricopeptide repeat domain-containing protein 3, mitochondrial

Mitochondrial RNA-binding protein

PTPRA

Receptor-type tyrosine-protein phosphatase alpha

Regulation of integrin signaling, cell adhesion and proliferation

RAB7A

Ras-related protein Rab-7a

Key regulator in endo-lysosomal trafficking

RPL18

60S ribosomal protein L18

Component of the ribosomal 60S subunit

RPL37A

60S ribosomal protein L37a

Component of the ribosomal 60S subunit

SLC25A3

Phosphate carrier protein, mitochondrial

Transport of phosphate groups from the cytosol to the mitochondrial matrix

SOSTDC1

Sclerostin domain-containing protein 1

Bone morphogenetic protein antagonist

SRP54

Signal recognition particle 54 kDa protein

Transfer of presecretory protein from ribosomes to TRAM (translocating chain-associating membrane protein)

STAG2

Cohesin subunit SA-2

Component of the cohesin complex

SUCLG2

Succinyl-CoA ligase [GDP-forming] subunit beta, mitochondrial

Citric acid cycle

SULT1A1

Sulfotransferase 1A1

Sulfate conjugation of catecholamines, phenolic drugs and neurotransmitters

TOR1A

Torsin-1A

Protein folding, processing, stability and localization

TRA2B

Transformer-2 protein homolog beta

Pre-mRNA splicing

UBA1

Ubiquitin-like modifier-activating enzyme 1

Ubiquitin conjugation

VPS18

Vacuolar protein sorting-associated protein 18 homolog

Vesicle-mediated protein trafficking to lysosomal compartments