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GENE AND PROTEIN SUMMARY

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Gene name

ARHGEF18

Description

Rho/Rac guanine nucleotide exchange factor (GEF) 18

Protein class

Mapped to UniProt SWISS-PROT

Protein evidence

High

Entrez gene summary

Rho GTPases are GTP binding proteins that regulate a wide spectrum of cellular functions. These cellular processes include cytoskeletal rearrangements, gene transcription, cell growth and motility. Activation of Rho GTPases is under the direct control of guanine nucleotide exchange factors (GEFs). The protein encoded by this gene is a guanine nucleotide exchange factor and belongs to the Rho GTPase GFE family. Family members share a common feature, a Dbl (DH) homology domain followed by a pleckstrin (PH) homology domain. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Oct 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

2 in total
0 with predicted TM region
0 with predicted signal peptide

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Cytoplasm

Additional location(s)

Plasma membrane 

Staining summary

Staining of cytoplasm in all three cell lines and of plasma membrane in A-431.

Reliability (Single)

Antibodies in assay

HPA042689
 

NORMAL TISSUE & ORGAN SUMMARY

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Staining summary

Most normal tissues showed weak to moderate cytoplasmic positivity. Alveolar macrophages, adrenal cortex, placental trophoblastic cells, non-germinal center cells in lymphoid tissues, subset of renal tubules, heart and skeletal muscles were strongly stained. Strong nuclear positivity was exhibited in subset of cells in seminiferus ducts of testis. Cells of CNS, liver, islets of Langerhans and smooth muscle cells were negative.

Tissue specificity

Staining in 46 out of 79 cell types

Reliability (Single)

Antibodies in assay

HPA042689
 

Organ

No of cell types

Antibody staining

CNS (brain) 11
Hematopoietic (blood) 8
Liver and pancreas 5
Digestive (GI-tract) 13
Respiratory (lung) 4
Cardiovascular 1
Female tissues 12
Placenta 2
Male tissues 5
Urinary tract (kidney) 3
Skin and soft tissues 12
Endocrine tissues 3

Level of antibody staining





Strong
Moderate
Weak
Negative

CANCER TISSUE SUMMARY

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Staining summary

Antibody staining in 47% of the cancers

Antibodies in assay

HPA042689
 

Tissue

Cancer staining

Normal tissue
staining

Breast cancer
 
Carcinoid
 
Cervical cancer
 
 
Colorectal cancer
 
 
Endometrial cancer
 
 
Glioma
 
Head and neck cancer
 
 
Liver cancer
 
 
Lung cancer
 
 
Lymphoma
 
 
 

Tissue

Cancer staining

Normal tissue
staining

Melanoma
 
Ovarian cancer
 
Pancreatic cancer
 
Prostate cancer
 
Renal cancer
 
Skin cancer
 
Stomach cancer
 
 
Testis cancer
 
Thyroid cancer
 
Urothelial cancer
 

Level of antibody staining





Strong
Moderate
Weak
Negative

CELL LINE SUMMARY

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RNA evidence

Medium
 

Cell line

Cell origin

RNA abundance

IH staining

IF intensity

HPA042689

HPA042689

A-431 Skin Medium
Weak
A-549 Lung Medium
CACO-2 Colon Medium
HEK 293 Embryonal kidney Medium
HeLa Cervix Medium
Hep-G2 Liver Medium
MCF-7 Pleural effusion Medium
PC-3 Bone marrow Medium
RT-4 Urinary bladder Medium
U-2 OS Bone Medium
Weak
U-251 MG Brain Medium
Moderate

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

HPA042689 pAb