Transmembrane protein 175, or TMEM175, is a transmembrane protein that is thought to be an endolysosomal potassium channel. It is predicted to have many orthologs across eukaryotes.
Based on human and mouse EST profiles and a human tissue GEO profile, TMEM175 appears to be expressed at a relatively high level (75-98%) in normal tissues.[1] [2] TMEM175 appears to be down regulated in stage three ovarian cancer.[3]
Transmembrane protein 175 has no paralogs. It does have orthologs within eukaryotes. The following table presents some of the orthologs found using searches in BLAST[4] and BLAT.[5] This list does not contain all of the orthologs for TMEM175. It is meant to display the diversity of species for which orthologs are found.
| Scientific name | Common Name | Accession Number | Sequence Length | Percent Identity | Percent Similarity | |
|---|---|---|---|---|---|---|
| Homo Sapiens | Human | NP_115702.1 | 504 | - | - | |
| Pan troglodytes | Chimp | XP_001141076 | 504 | 92 | 93 | |
| Pongo abelii | Orangutan | XP_002814537 | 231 | 99 | 99 | |
| Macaca mulatta | Rhesus | XP_001085173.1 | 403 | 96 | 98 | |
| Callithrix jacchus | Marmoset | XP_002746113.1 | 472 | 83 | 87 | |
| Bos taurus | Cow | NP_001069081.1 | 479 | 77 | 82 | |
| Ailuropoda melanoleuca | Panda | XP_002924455.1 | 498 | 81 | 87 | |
| Equus caballus | Horse | XP_001488271.1 | 499 | 81 | 86 | |
| Rattus norvegicus | Rat | NP_001014013.1 | 499 | 82 | 88 | |
| Mus musculus | Mouse | NP_082499.3 | 499 | 81 | 88 | |
| Monodelphis domestica | Opossum | XP_001377424.1 | 502 | 67 | 80 | |
| Ornithorhynchus anatinus | Platypus | XP_001514176 | 499 | 68 | 82 | |
| Gallus gallus | Chicken | NP_001006582.1 | 501 | 64 | 78 | |
| Sceloporus occidentalis | Lizard | - | 417 | 56 | 66 | |
| Taeniopygia guttata | Zebra Finch | XP_002187908.1 | 496 | 66 | 79 | |
| Danio rerio | Zebra Fish | NP_001093545.1 | 520 | 62 | 76 | |
| Branchiostoma floridae | Lancelet | XP_002596272 | 409 | 31 | 50 | |
| Ciona intestinalis | Sea Squirt | XP_002122718 | 494 | 27 | 50 | |
| Nematostella vectensis | Starlet Sea Anemone | XP_001630719 | 489 | 28 | 49 |
Using various tools at ExPASy[6] the following are possible post-translational modifications for TMEM175.
The N-myristoylation sites are conserved in vertebrates.