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RNF227

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RING Finger Protein 227, also known as RNF227 and LINC02581, is a protein which in humans is encoded by the RNF227 gene.[1] According to DNA microarray data, it is found in at least 15 tissues.[1] [citation needed]

Gene

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In humans, the RNF227 gene is found on chromosome 17 p13.1. Its mRNA sequence is 2850 base pairs in length and includes 2 exons. The coding sequence is from base pairs 95 to 2835.[2]

Protein

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The RNF227 protein is 190 amino acids in length, seen in the table below.[3]

 
Predicted secondary structure.[4]
 
Predicted tertiary structure.[1]
1

MQLLVRVPSL PERGELDCNI CYRPFNLGCR APRRLPGTAR ARCGHTICTA CLRELAARGD

61

GGGAAARVVR LRRVVTCPFC RAPSQLPRGG LTEMALDSDL WSRLEEKARA KCERDEAGNP

121

AKESSDADGE AEEEGESEKG AGPRSAGWRA LRRLWDRVLG PARRWRRPLP SNVLYCAEIK

181

DIGHLTRCTL

Predicted properties

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Using tools at Expasy, the predicted molecular weight of the protein sequence is 20,875 kilodaltons[3] with an isoelectric point of 9.23.[5] The Statistical Analysis of Protein Sequences tool detected two repetitive structures: CRAPRRLP from positions 29 to 36 and CRAPSQLP from positions 80 to 87.[6]

Zinc finger domain

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RING Finger Protein 227 has a zinc finger domain from position 18 to 81, which is highly conserved throughout many eukaryotic organisms.[7]

Secondary structure

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The secondary structure was predicted by the I-TASSER server and shows 7 alpha helices, 4 beta strands, and 12 coils.[4]

Tertiary structure

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The tertiary structure was predicted by the I-TASSER with a confidence score of -3.42, which is typically in the range from -5 to 2.[4]

Gene level regulation

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RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes. The highest expression can be seen in the skin, with an expression value of 22 ± 4.5 Reads per Kilobase of transcript, per Million mapped reads (RPKM). Transcription profiling was done by high throughput sequencing of individual and mixtures of 16 human tissues RNA to show the highest expression in the testes. Additionally, the lowest expression is seen in the liver. RNA sequencing was conducted of the total RNA from 20 human tissues which showed high expression in the brain, both in the cerebellum and fetal tissues. 35 human fetal samples from 6 tissues (3 – 7 replicates per tissue) collected between 10- and 20-weeks gestational time were sequence using Illumina TruSeq Stranded Total RNA. This shows very high expression in the intestine after 11 weeks and the kidney after 10 weeks.[1]

Three experiments were found that show what conditions RNF227 rises and falls. A study conducted on T cell-driven IL-22 amplification of Il-1beta-driven inflammation in human adipose tissue shows how there is higher expression of RNF227 in obese non-diabetic patients.[8] An analysis of non-invasive NeuN cells and invasive NeuT cells treated with interstitial fluid flow resulted in higher expression of RNF227 in the NeuN cell line in both the static and flow protocols. This gives insight into the molecular pathways activated by interstitial fluid flow in ERBB2-positive breast cancer cells.[9] The last experiment showed how the effect of Rho kinase inhibition on long-term keratinocyte proliferation is rapid and conditional and resulted in higher expression in the control agent as compared to the Y-27632 agent.[10]

Transcript level regulation

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Stem-Loop Diagram of 5' UTR of RNF227.
 
Conceptual translation of RNF227.

The diagram to the right depicts the stem-loop formation of the 5' untranslated region of RNF227.[11] The BED4.02, ZFX.01, and ZIC3.03 transcription factors are seen with RNF227, which is notable because they are all associated with zinc finger domains.[12] Translation is initiated at the AUG start codon, as seen in the conceptual translation.

Protein level regulation

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The Motif Scan tool at MyHits predicted casein kinase II phosphorylation sites (from positions 9 to 12, 102 to 105, and 125 to 128), N-myristylation sites (from positions 37 to 42 and 61 to 66), and protein kinase c phosphorylation sites (from positions 38 to 40 and 137 to 139).[13]

Additionally, PSORT II predicted a 69.6% chance for the protein sequence to be found in the nucleus of a cell.[14]

Homology

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Multiple sequence alignment of mammalian orthologs.[15]
 
Multiple sequence alignment of amphibian orthologs.[15]
 
Multiple sequence alignment of fish orthologs.[15]

RING Finger Protein 227 has no paralogs. It does, however, have numerous orthologs extending throughout eukaryotes. The following table presents a selection of orthologs found using searches in BLAST[16] and BLAT.[17] This is not meant to be a comprehensive list, rather a small sample that shows the diversity of species in which orthologs are found.

Genus and Species Common Name Taxonomic Group Date of Divergence (Million Years Ago) Accession Number Sequence Length (amino acids) Sequence Identity Sequence Similarity
Homo sapiens Human Primates 0 NP_001345628.1 190 100% 100%
Neotoma lepida Desert Woodrat Rodentia 90 OBS67541.1 164 67.9% 73.7%
Microtus ochrogaster Prairie vole Rodentia 90 XP_026636787.1 214 67.4% 74.4%
Dipodomys ordii Ord's Kangaroo Rat Rodentia 90 XP_012868576.1 158 64.8% 68.9%
Balaenoptera acutorostrata scammoni Minke Whale Artiodactyla 90 XP_028024073.1 166 65.3% 71.1%
Vulpes vulpes Red Fox Carnivora 96 XP_025861213.1 160 62.8% 72.3%
Vicugna pacos Alpaca Artiodactyla 96 XP_006218277.1 156 24.8% 30.4%
Vombatus ursinus Common Wombat Diprotondontia 159 XP_027712916.1 180 62.0% 74.5%
Sarcophilus harrisii Tasmanian Devil Dasyuromorphia 159 XP_023358488.2 172 58.8% 66.2%
Gallus gallus Chicken Galliformes 312 XP_001234238.1 168 25.9% 36.1%
Geotrypetes seraphini Gaboon Caecilian Gymnophiona 351.8 XP_033780950.1 150 37.2% 46.9%
Rhinatrema bivittatum Two-lined Caecilian Gymnophiona 351.8 XP_029437562.1 152 35.7% 48.0%
Microcaecilia unicolor Cayenne Caecilian Gymnophiona 351.8 XP_030043188.1 148 34.4% 46.9%
Xenopus tropicalis Western Clawed Frog Anura 351.8 XP_031750786.1 178 19.1% 43.4%
Scleropages formosus Asian Arowana Osteoglossiformes 435 XP_029113159.1 165 30.6% 44.9%
Astyanax mexicanus Mexican Tetra Characiformes 435 XP_007231481.2 161 28.0% 37.4%
Paramormyrops kinsleyae Old Calabar Mormyrid Osteoglossiformes 435 XP_023674393.1 165 26.6% 32.3%
Lepisosteus oculatus Spotted Gar Lepisosteiformes 435 XP_006640609.2 172 24.6% 33.0%
Salmo trutta Brown Trout Saloniformes 435 XP_029622555.1 190 24.2% 29.6%
Danio rerio Zebrafish Cypriniformes 435 NP_001121828.1 187 23.6% 35.6%

References

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  1. ^ a b c d "RNF227 ring finger protein 227 [Homo sapiens (human)] - Gene - NCBI". www.ncbi.nlm.nih.gov. Retrieved 2020-12-17.
  2. ^ "Homo sapiens ring finger protein 227 (RNF227), transcript variant 1, mRNA - Nucleotide - NCBI". www.ncbi.nlm.nih.gov. 9 June 2022.
  3. ^ a b "RING finger protein 227 [Homo sapiens] - Protein - NCBI". www.ncbi.nlm.nih.gov. Retrieved 2020-12-17.
  4. ^ a b c "I-TASSER results". zhanglab.ccmb.med.umich.edu. Retrieved 2020-12-17.
  5. ^ "Compute pI/MW". Expasy.[permanent dead link‍]
  6. ^ "SAPS Results". www.ebi.ac.uk. Retrieved 2020-12-19.
  7. ^ "RNF227 - RING finger protein 227 - Homo sapiens (Human) - RNF227 gene & protein". www.uniprot.org. Retrieved 2020-12-17.
  8. ^ "Type 2 diabetic obese patients: visceral adipose tissue CD14+ cells". www.ncbi.nlm.nih.gov. Retrieved 2020-12-19.
  9. ^ "Interstitial fluid flow effect on noninvasive and invasive ERBB2-positive breast cancer cells". www.ncbi.nlm.nih.gov. Retrieved 2020-12-19.
  10. ^ "Rho kinase inhibition effect on epidermal keratinocyte in vitro". www.ncbi.nlm.nih.gov. Retrieved 2020-12-19.
  11. ^ "RNAfold web server". rna.tbi.univie.ac.at. Retrieved 2020-12-19.
  12. ^ "Genomatix: Retrieve and analyze promoters: Query Input". www.genomatix.de. Retrieved 2020-12-19.
  13. ^ "Motif Scan". myhits.sib.swiss. Retrieved 2020-12-19.
  14. ^ "PSORT II Prediction".[permanent dead link‍]
  15. ^ a b c "Clustal Omega < Multiple Sequence Alignment < EMBL-EBI". www.ebi.ac.uk. Retrieved 2020-12-19.
  16. ^ "BLAST: Basic Local Alignment Search Tool". blast.ncbi.nlm.nih.gov. Retrieved 2020-12-19.
  17. ^ "Human BLAT Search". genome.ucsc.edu. Retrieved 2020-12-19.
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