Table 2 Significantly downregulated proteins during storage (high in control cells).

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

Gene Symbol

Gene Description

Biological function

ABCA1

ATP-binding cassette sub-family A member 1

Transmembrane transport

ATP1A1

Sodium/potassium-transporting ATPase subunit alpha-1

Hydrolysis of ATP coupled with the exchange of sodium and potassium ions across the plasma membrane

ATP1A3

Sodium/potassium-transporting ATPase subunit alpha-3

Hydrolysis of ATP coupled with the exchange of sodium and potassium ions across the plasma membrane

ATP6V1C2

V-type proton ATPase subunit C 2

Subunit of the vacuolar ATPase

CD2AP

CD2-associated protein

Adapter protein between membrane proteins and the actin cytoskeleton

COASY

Bifunctional coenzyme A synthase

CoA biosynthetic pathway

COPZ1

Coatomer subunit zeta-1

Binds dilysine motifs, reversibly associates with Golgi non-clathrin-coated vesicles

CTTN

Src substrate cortactin

Organization of the actin cytoskeleton

EIF2S2

Eukaryotic translation initiation factor 2 subunit 2

Early protein synthesis

EIF4A3

Eukaryotic initiation factor 4A-III

ATP-dependent RNA helicase

FAH

Fumarylacetoacetase

Tyrosine catabolism

FAM234A

Protein ITFG3/Protein FAM234A

Unknown

FERMT2

Fermitin family homolog 2

Scaffolding protein, activates integrin

FNDC3A

Fibronectin type-III domain-containing protein 3A

Spermatid-Sertoli adhesion in spermatogenesis

G3BP2

Ras GTPase-activating protein-binding protein 2

Probable scaffold protein, may be involved in mRNA transport

GDI2

Rab GDP dissociation inhibitor beta

Regulates the GDP/GTP exchange reaction of Rab proteins

GLYR1

Putative oxidoreductase GLYR1

Promotes KDM1B demethylase activity

GNPDA1

Glucosamine-6-phosphate isomerase 1

Conversion of D-glucosamine-6-phosphate into D-fructose-6-phosphate and ammonium

GOLM1

Golgi membrane protein 1

Unknown

GPX8

Probable glutathione peroxidase 8

Unknown

HDDC2

HD domain-containing protein 2

Unknown

HSD17B10

3-hydroxyacyl-CoA dehydrogenase type-2

Mitochondrial tRNA maturation

KIF5B

Kinesin-1 heavy chain

Distribution of mitochondria and lysosomes

KPNA2

Importin subunit alpha-1

Nuclear protein import

KPNB1

Importin subunit beta-1

Nuclear protein import

LDHB

L-lactate dehydrogenase B chain

Synthesizes lactate from pyruvate

LIMCH1

LIM and calponin homology domains-containing protein 1

Unknown

LPL

Lipoprotein lipase

Hydrolysis of triglycerides of chylomicrons and very low density lipoproteins

LRRN1

Leucine-rich repeat neuronal protein 1

Unknown

MAP4

Microtubule-associated protein 4

Promotes microtubule assembly

MARS

Methionine–tRNA ligase, cytoplasmic

Ligation of methionine to tRNA molecules

MAT2B

Methionine adenosyltransferase 2 subunit beta

Regulatory subunit of S-adenosylmethionine synthetase 2

MPI

Mannose-6-phosphate isomerase

Mannosyl transfer reactions

MRPL2

39 S ribosomal protein L2, mitochondrial

Component of the 39 S mitochondrial ribosome subunit

MYO1D

Unconventional myosin-Id

Intracellular movement

MYRIP

Rab effector MyRIP

Melanosome transport

NDUFB3

NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 3

Mitochondrial respiratory chain NADH dehydrogenase

NHP2

H/ACA ribonucleoprotein complex subunit 2

Ribosome biogenesis

NOV

Protein NOV homolog

Cell proliferation, adhesion, differentiation

PARK7

Protein DJ-1

Oxidative stress and cell death protection

PDAP1

28 kDa heat- and acid-stable phosphoprotein

PDGFA-stimulated fibroblast growth

PLS3

Plastin-3

Actin-bundling protein of intestinal microvilli, stereocilia, fibroblast filopodia

RABGAP1

Rab GTPase-activating protein 1

Unknown

RHOT2

Mitochondrial Rho GTPase 2

Mitochondrial trafficking

RPS13

40S ribosomal protein S13

Component of the ribosomal 40S subunit

RTCB

tRNA-splicing ligase RtcB homolog

Subunit of tRNA-splicing ligase

SCPEP1

Retinoid-inducible serine carboxypeptidase

Unknown

SEC23B

Protein transport protein Sec. 23B

ER-derived vesicle transport

SLC1A5

Neutral amino acid transporter B(0)

Sodium-dependent amino acid transport

SLC7A5

Large neutral amino acids transporter small subunit 1

L-leucine transport across the blood-retinal barrier

SMARCD1

SWI/SNF-related matrix-associated actin-dependent regulator of chromatin subfamily D member 1

Chromatin remodeling

SPR

Sepiapterin reductase

Reduction of pteridine derivatives

TKFC

Triokinase/FMN cyclase

Dihydroxyacetone phosphorylation

TNKS1BP1

182 kDa tankyrase-1-binding protein

Colocalizes with chromosomes in mitosis

TPRN

Taperin

Sensory epithelial protein associated with autosomal recessive deafness.

TSPAN4

Tetraspanin-4

Cell surface glycoprotein binding to integrin

TWF2

Twinfilin-2

Actin-binding protein involved in motile and morphological processes

TXNL1

Thioredoxin-like protein 1

Active thioredoxin

TYR

Tyrosinase

Formation of pigments, melanin production from tyrosine

UBE2O

E2 ubiquitin-conjugating enzyme

Monoubiquitination of target proteins

UNC13D

Protein unc-13 homolog D

Vesicle maturation during exocytosis

USP5

Ubiquitin carboxyl-terminal hydrolase 5

Cleaves multiubiquitin polymers

VCL

Vinculin

Actin binding protein involved in cell-matrix adhesion and cell-cell adhesion

VPS25

Vacuolar protein-sorting-associated protein 25

Sorting of ubiquitinated membrane proteins during endocytosis

YAP1

Transcriptional coactivator YAP1

Critical regulatory target of the Hippo signaling pathway