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KLHL28

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KLHL28

Sequential rainbow 3D tertiary protein structure of human KLHL28 modeled using NCBI Structure.

Overview

Kelch-Like Homolog 28 (KLHL28) is a protein that is encoded by the KLHL28 gene in humans. It is a member of the Kelch-like gene family, which is comprised of 42 different genes. Aberrant activation of KLHL28 results in increased likelihood of hypertension, hyperkalemia, and cancer. The KLHL28 gene is also known as BTBD5 and has orthologs in vertebrates and some marine invertebrates, and has been well-conserved over evolutionary timescales.

Gene

The KLHL28 gene is located on the negative strand of human Chromosome 14 (14q21.2) and spans 7019 base pairs in its complete isoform (isoform 1).

Transcription Factors

Expression

Mutations

mRNA and Transcriptional Variants

Transcript variants and protein isoforms of the KLHL28 gene in Homo sapiens. Blue boxes indicate the exon is present in the transcript variant, while red boxes indicate the exon is absent.

There are a total of seven transcriptional variants: two isoforms and five spliced transcript variants, all of which are based on the longest transcript, isoform 1. Isoform 1 contains five exons, and all transcriptional variants contain at least exon 2. The six conserved Kelch motifs in the KLHL28 protein are found through the end of exon 2 through exon 5.

The predicted secondary mRNA structure for the human KLHL28 5’ untranslated region (UTR) created using RNAstructure. The folding free energy of this structure is -122.6 kcal/mol. A) Zoomed-out view of the entire 5’ UTR. B) An enhanced image of the UTR start and end (ATG in green) and conserved stem-loop structures (red boxes).

5' Untranslated Region

The predicted secondary mRNA structure for the human KLHL28 3’ untranslated region (UTR) created using RNAstructure. The folding free energy of this structure is -748.2 kcal/mol. A) Zoomed-out view of the entire 3' UTR. B) An enhanced image of the 3’ UTR start. C) An enhanced image of the polyA site (blue box). D) An enhanced image of a section of stem-loops strongly conserved across simulated structural models.

3' Untranslated Region

Protein

Amino acid composition of human KLHL28 using statistical analysis of protein sequences (SAPS) online tool. A) Entire KLHL28 protein. B) BTB domain. C) Kelch region.

Amino Acid Composition

The theoretical isoelectric point (Ip) was predicted to be 5.90 based on the amino acid composition.

Protein Domains

Create domains table, also find source to highlight secondary structure of protein (i.e., highlights areas which are beta sheets vs alpha helices)

Post-Translational Modifications

miRNA, RNA binding proteins, phosphorylation, etc.

A schematic of the protein domains and predicted post-translational modifications for human KLHL28 created using IBS2.0. Red markers indicate phosphorylation sites.

Tertiary Structure

Cellular Localization

Function

The KLHL28 gene encodes the KLHL28 protein which is 585 amino acids long and has a molecular weight of 65.8kDa.

Protein-Protein Interaction Network

The majority of identified proteins found to interact with the KLHL28 protein in humans are involved in the E3 ubiquitin ligase structure.

Evolution

Unrooted phylogenetic tree illustrating KLHL28 gene similarity across evolutionary time and groups. M. fascicularis is Crab-eating macaque, L. canadensis is Canada lynx, M. musculus is Mouse, T. alba is Barn owl, S. humboldti is Humboldt penguin, A. sagrei is Brown anole, T. sirtalis is Garter snake, C. aspera is Ground boa, B. bufo is Toad, L. chalumnae is Coelacanth, and D. rerio is Zebrafish.
A scatterplot graph comparing the corrected divergence (m) between human KLHL28 and its orthologs (blue triangles), human Cytochrome C (orange circles), and human Fibrinogen a (green squares).

Orthologs

Selected Orthologs of KLHL28
Common Name Taxonomic Group Median Date of Divergence (MYA) Protein Accession # Sequence Length (aa) Identity to Human (%) Similarity to Human (%)
Human Primates 0 NP_001295041.1 585 100.0 100.0
Crab-eating Macaque Primates 28.8 XP_015308707.1 585 99.2 99.3
Canada Lynx Carnivora 94 XP_030174874.1 571 98.8 97.3
Sack-winged Bat Chiroptera 94 XP_066133942.1 571 96.3 97.1
House Mouse Rodentia 87 NP_079983.1 571 97.0 96.8
Orca Artiodactyls 94 XP_004270054.1 571 99.1 96.2
Koala Diprotodontia 160 XP_020842083.1 645 93.2 84.8
Common Garter Snake Squamata 319 XP_013915426.1 571 87.7 95.4
Brown Anole Squamata 319 XP_060644111.2 571 87.0 95.0
Papuan Ground Boa Squamata 319 XP_063146665.1 571 87.6 92.3
American Alligator Crocodilia 319 KYO47230.1 585 93.2 92.0
Kori Bustard Otidiformes 319 NXE21565.1 577 92.5 95.6
Humboldt Penguin Sphenisciformes 319 KAF1420631.1 577 92.2 95.2
Barn Owl Strigiformes 319 XP_042655085.1 571 92.5 94.9
Chicken Galliformes 319 XP_015132273.1 571 92.6 91.8
Gaboon Caecilian Gymnophiona 352 XP_033809266.1 574 92.5 95.0
American Toad Anura 352 XP_040267576.1 571 88.1 92.1
Coelacanth Latimeriodei 415 XP_064420773.1 571 88.4 92.3
Zebrafish Cypriniformes 429 XP_017207216.1 571 83.2 90.4
Small-toothed Sawfish Rhinoprisitiformes 462 XP_051874951.1 571 85.1 89.7
Great White Shark Lamniformes 462 XP_041069815.1 571 85.5 89.9
Sea Lamprey Petromyzontiformes 563 XP_032831289.1 611 61.4 71.0
European Lancelet Amphioxiformes 581 XP_066281657.1 574 56.6 70.3
Crown-of-thorns Starfish Valvatida 619 XP_022083107.1 576 53.3 67.9
Branching Stony Coral Scleractinia 685 XP_029214089.1 570 49.7 65.8
Chiton Chitonida 686 XP_064600849.1 521 47.8 55.5

Paralogs

Selected Paralogs of KLHL28
Gene Name Protein Accession # Sequence Length (aa) Identity to KLHL28 (%) Similarity to KLHL28 (%)
KLHL28 NP_001295041.1 585 100.0 100.0
KLHL5 NP_001007076.1 709 39.9 57.4
KLHL3 NP_059111.2 587 38.7 54.9
KLHL20 NP_055273.2 609 42.8 54.3
KLHL17 NP_938073.1 642 41.7 54.5
KLHL1 NP_066917.1 748 40.6 53.5

Clinical Significance

References

  1. Dhanoa, Bajinder S.; Cogliati, Tiziana; Satish, Akhila G.; Bruford, Elspeth A.; Friedman, James S. (2013-05-15). "Update on the Kelch-like (KLHL) gene family". Human Genomics. 7 (1): 13. doi:10.1186/1479-7364-7-13. ISSN 1479-7364. PMC 3658946. PMID 23676014.{{cite journal}}: CS1 maint: PMC format (link) CS1 maint: unflagged free DOI (link)
  2. Zhang, Xiaocong; Chen, Ziqi; Zang, Jiabin; Yao, Chun; Shi, Jian; Nie, Ruqiong; Wu, Guifu (2021-03-05). "LncRNA-mRNA co-expression analysis discovered the diagnostic and prognostic biomarkers and potential therapeutic agents for myocardial infarction". Aging. 13 (6): 8944–8959. doi:10.18632/aging.202713. ISSN 1945-4589. PMC 8034908. PMID 33668039.{{cite journal}}: CS1 maint: PMC format (link)
  3. ^ "KLHL28 kelch like family member 28 [Homo sapiens (human)] - Gene - NCBI". www.ncbi.nlm.nih.gov. Retrieved 2024-12-05.
  4. "Welcome to the Fold Web Server". rna.urmc.rochester.edu. Retrieved 2024-12-10.
  5. "Welcome to the Fold Web Server". rna.urmc.rochester.edu. Retrieved 2024-12-10.
  6. www.ebi.ac.uk https://www.ebi.ac.uk/jdispatcher/seqstats/saps. Retrieved 2024-12-10. {{cite web}}: Missing or empty |title= (help)
  7. "Expasy - Compute pI/Mw tool". web.expasy.org. Retrieved 2024-12-10.