P23942 (PRPH2_HUMAN) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 135.
History...
Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Web links·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Web links·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Peripherin-2 Alternative name(s): Retinal degeneration slow protein Tetraspanin-22 Short name=Tspan-22 | ||||
| Gene names |
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| Organism | Homo sapiens (Human) [Reference proteome] | ||||
| Taxonomic identifier | 9606 [NCBI] | ||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo![]() |
Protein attributes
| Sequence length | 346 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | May function as an adhesion molecule involved in stabilization and compaction of outer segment disks or in the maintenance of the curvature of the rim. It is essential for disk morphogenesis. |
| Subunit structure | Homodimer; disulfide-linked. Probably forms a complex with a ROM1 homodimer. Other proteins could associate with this complex in rods. Interacts with MREG. |
| Subcellular location | |
| Tissue specificity | Retina (photoreceptor). In rim region of ROS (rod outer segment) disks. |
| Involvement in disease | Retinitis pigmentosa 7 (RP7) [MIM:608133]: A retinal dystrophy belonging to the group of pigmentary retinopathies. Retinitis pigmentosa is characterized by retinal pigment deposits visible on fundus examination and primary loss of rod photoreceptor cells followed by secondary loss of cone photoreceptors. Patients typically have night vision blindness and loss of midperipheral visual field. As their condition progresses, they lose their far peripheral visual field and eventually central vision as well. Retinitis punctata albescens (RPA) [MIM:136880]: Rare form of stationary night blindness characterized by a delay in the regeneration of cone and rod photopigments. Adult-onset vitelliform macular dystrophy (AVMD) [MIM:608161]: A rare autosomal dominant disorder with incomplete penetrance and highly variable expression. Patients usually become symptomatic in the fourth or fifth decade of life with a protracted disease of decreased visual acuity. Patterned dystrophy of retinal pigment epithelium (PDREP) [MIM:169150]: A heterogeneous group of macular disorders. Three main types of PDREP have been described: reticular (fishnet-like) dystrophy, macroreticular (spider-shaped) dystrophy and butterfly-shaped pigment dystrophy. Choroidal dystrophy, central areolar 2 (CACD2) [MIM:613105]: A disease of the macula leading to a well-demarcated circumscribed area of atrophy of the pigment epithelium and choriocapillaris. Defects in PRPH2 are found in different retinal diseases including cone-rod dystrophy, retinitis pigmentosa, macular degeneration. The mutations underlying autosomal dominant retinitis pigmentosa and severe macular degeneration are largely missense or small in-frame deletions in a large intradiscal loop between the third and fourth transmembrane domains. In contrast, those associated with the milder pattern phenotypes or with digenic RP are scattered more evenly through the gene and are often nonsense mutations. This observation correlates with the hypothesis that the large loop is an important site of interaction between PRPH2 molecules and other protein components in the disk. |
| Sequence similarities | Belongs to the PRPH2/ROM1 family. |
Ontologies
| Keywords | |
|---|---|
| Biological process | Cell adhesion |
| Cellular component | Membrane |
| Coding sequence diversity | Polymorphism |
| Disease | Cone-rod dystrophy Disease mutation Retinitis pigmentosa |
| Domain | Transmembrane Transmembrane helix |
| PTM | Disulfide bond Glycoprotein |
| Technical term | Complete proteome Reference proteome |
| Gene Ontology (GO) | |
| Biological_process | cell adhesion Inferred from electronic annotation. Source: UniProtKB-KW retina development in camera-type eyeInferred from electronic annotation. Source: Compara visual perceptionTraceable author statement Ref.6. Source: ProtInc |
| Cellular_component | integral to membrane Traceable author statement Ref.6. Source: ProtInc |
| Complete GO annotation... | |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 346 | 346 | Peripherin-2 | PRO_0000168105 | |||||
Regions | |||||||||
| Topological domain | 1 – 24 | 24 | Cytoplasmic Potential | ||||||
| Transmembrane | 25 – 43 | 19 | Helical; Potential | ||||||
| Topological domain | 44 – 61 | 18 | Lumenal Potential | ||||||
| Transmembrane | 62 – 80 | 19 | Helical; Potential | ||||||
| Topological domain | 81 – 99 | 19 | Cytoplasmic Potential | ||||||
| Transmembrane | 100 – 123 | 24 | Helical; Potential | ||||||
| Topological domain | 124 – 264 | 141 | Lumenal Potential | ||||||
| Transmembrane | 265 – 290 | 26 | Helical; Potential | ||||||
| Topological domain | 291 – 346 | 56 | Cytoplasmic Potential | ||||||
| Region | 341 – 346 | 6 | Interaction with MREG By similarity | ||||||
Amino acid modifications | |||||||||
| Glycosylation | 53 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 229 | 1 | N-linked (GlcNAc...) Potential | ||||||
Natural variations | |||||||||
| Natural variant | 13 | 1 | R → W in RP7; in combination with a null mutation of ROM1. | VAR_006853 | |||||
| Natural variant | 32 | 1 | I → V in some patients with macular dystrophy. | VAR_006854 | |||||
| Natural variant | 45 | 1 | L → F in RP7; in combination with a null mutation of ROM1. | VAR_006855 | |||||
| Natural variant | 67 | 1 | Missing in PDREP; also in cone-rod dystrophy. | VAR_006856 | |||||
| Natural variant | 68 | 1 | G → R in PDREP; also in cone-rod dystrophy. | VAR_006857 | |||||
| Natural variant | 118 | 1 | Missing in RP7. Ref.6 | VAR_006858 | |||||
| Natural variant | 126 | 1 | L → R in RP7. | VAR_006859 | |||||
| Natural variant | 142 | 1 | R → W in RP7; also found in a patient with central areolar choroidal dystrophy. Ref.24 | VAR_006860 | |||||
| Natural variant | 153 | 1 | K → R in RP7. | VAR_006861 | |||||
| Natural variant | 153 | 1 | Missing in RP7. | VAR_006862 | |||||
| Natural variant | 157 | 1 | D → N in PDREP. | VAR_006863 | |||||
| Natural variant | 165 | 1 | C → Y in RP7. | VAR_006864 | |||||
| Natural variant | 167 | 1 | G → D in PDREP; butterfly-shaped. Ref.10 | VAR_006865 | |||||
| Natural variant | 167 | 1 | G → S in PDREP; butterfly-shaped. Ref.22 | VAR_032052 | |||||
| Natural variant | 169 | 1 | Missing in some patients with macular dystrophy. Ref.21 | VAR_032053 | |||||
| Natural variant | 172 | 1 | R → G in PDREP; butterfly-shaped. | VAR_006866 | |||||
| Natural variant | 172 | 1 | R → Q in some patients with macular dystrophy. Ref.11 | VAR_006867 | |||||
| Natural variant | 172 | 1 | R → W in some patients with macular dystrophy; also in a family affected by central areolar choroidal dystrophy. Ref.11 Ref.14 Ref.18 | VAR_006868 | |||||
| Natural variant | 173 | 1 | D → V in RP7. | VAR_006869 | |||||
| Natural variant | 184 | 1 | Y → S in cone-rod dystrophy. | VAR_006870 | |||||
| Natural variant | 185 | 1 | L → P in RP7; digenic inheritance; results in disease in combination with a null mutation of ROM1. Ref.7 | VAR_006871 | |||||
| Natural variant | 193 | 1 | Missing in PDREP; also in cone-rod dystrophy. | VAR_006872 | |||||
| Natural variant | 195 | 1 | R → L in CACD2. Ref.23 | VAR_032054 | |||||
| Natural variant | 208 | 1 | G → D in RP7. Ref.20 | VAR_006873 | |||||
| Natural variant | 210 | 1 | P → R in PDREP and RP7; also in adult-onset foveomacular dystrophy with choroidal neovascularization. Ref.12 Ref.16 Ref.18 | VAR_006874 | |||||
| Natural variant | 210 | 1 | P → S in RP7. | VAR_006875 | |||||
| Natural variant | 211 | 1 | F → L in RP7. | VAR_006876 | |||||
| Natural variant | 212 | 1 | S → G in RP7. Ref.8 | VAR_006877 | |||||
| Natural variant | 212 | 1 | S → T in AVMD. Ref.17 | VAR_006878 | |||||
| Natural variant | 213 | 1 | C → R in PDREP. Ref.18 | VAR_006879 | |||||
| Natural variant | 214 | 1 | C → S in RP7. | VAR_006880 | |||||
| Natural variant | 216 | 1 | P → L in RP7. Ref.7 | VAR_006881 | |||||
| Natural variant | 216 | 1 | P → S in RP7. | VAR_006882 | |||||
| Natural variant | 219 | 1 | P → R in some patients with macular dystrophy. Ref.18 | VAR_006883 | |||||
| Natural variant | 219 | 1 | Missing in RP7. Ref.7 | VAR_006884 | |||||
| Natural variant | 220 | 1 | R → Q in PDREP. | VAR_006885 | |||||
| Natural variant | 220 | 1 | R → W in PDREP. Ref.18 | VAR_006886 | |||||
| Natural variant | 244 | 1 | N → H in cone-rod dystrophy. | VAR_006888 | |||||
| Natural variant | 244 | 1 | N → K in RP7; with bulls-eye maculopathy. Ref.13 | VAR_006887 | |||||
| Natural variant | 266 | 1 | G → D in RP7. | VAR_006889 | |||||
| Natural variant | 268 | 1 | V → I in AVMD. Ref.17 | VAR_006890 | |||||
| Natural variant | 304 | 1 | E → Q Associated with D-338 on the same haplotype. Ref.3 Corresponds to variant rs390659 [ dbSNP | Ensembl ]. | VAR_006891 | |||||
| Natural variant | 305 | 1 | G → D in AVMD. Ref.17 | VAR_006892 | |||||
| Natural variant | 310 | 1 | K → R. Ref.3 Corresponds to variant rs425876 [ dbSNP | Ensembl ]. | VAR_006893 | |||||
| Natural variant | 313 | 1 | P → L. Ref.19 | VAR_006894 | |||||
| Natural variant | 338 | 1 | G → D Associated with Q-304 on the same haplotype. Ref.3 Corresponds to variant rs434102 [ dbSNP | Ensembl ]. | VAR_006895 | |||||
Experimental info | |||||||||
| Sequence conflict | 44 | 1 | E → G in AAH74720. Ref.4 | ||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "The human retinal degeneration slow (RDS) gene: chromosome assignment and structure of the mRNA." Travis G.H., Christerson L., Danielson P.E., Klisak I., Sparkes R.S., Hahn L.B., Dryja T.P., Sutcliffe G.J. Genomics 10:733-739(1991) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA]. |
| [2] | Kajiwara K. Submitted (FEB-1994) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]. |
| [3] | "The DNA sequence and analysis of human chromosome 6." Mungall A.J., Palmer S.A., Sims S.K., Edwards C.A., Ashurst J.L., Wilming L., Jones M.C., Horton R., Hunt S.E., Scott C.E., Gilbert J.G.R., Clamp M.E., Bethel G., Milne S., Ainscough R., Almeida J.P., Ambrose K.D., Andrews T.D. Beck S.Nature 425:805-811(2003) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA], VARIANTS GLN-304; ARG-310 AND ASP-338. |
| [4] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]. Tissue: Brain. |
| [5] | "Mutations and polymorphisms in the human peripherin-RDS gene and their involvement in inherited retinal degeneration." Keen T.J., Inglehearn C.F. Hum. Mutat. 8:297-303(1996) [PubMed] [Europe PMC] [Abstract] Cited for: REVIEW ON VARIANTS. |
| [6] | "A three-base-pair deletion in the peripherin-RDS gene in one form of retinitis pigmentosa." Farrar G.J., Kenna P., Jordan S.A., Kumar-Singh R., Humphries M.M., Sharp E.M., Sheils D.M., Humphries P. Nature 354:478-480(1991) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT RP7 CYS-118 DEL. |
| [7] | "Mutations in the human retinal degeneration slow gene in autosomal dominant retinitis pigmentosa." Kajiwara K., Hahn L.B., Mukai S., Travis G.H., Berson E.L., Dryja T.P. Nature 354:480-483(1991) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANTS RP7 PRO-185; LEU-216 AND PRO-219 DEL. |
| [8] | "Autosomal dominant retinitis pigmentosa: a novel mutation at the peripherin/RDS locus in the original 6p-linked pedigree." Farrar G.J., Kenna P., Jordan S.A., Kumar-Singh R., Humphries M.M., Sharp E.M., Sheils D.M., Humphries P. Genomics 14:805-807(1992) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT RP7 GLY-212. |
| [9] | Erratum Farrar G.J., Kenna P., Jordan S.A., Kumar-Singh R., Humphries M.M., Sharp E.M., Sheils D.M., Humphries P. Genomics 15:466-466(1993) [PubMed] [Europe PMC] [Abstract] |
| [10] | "Butterfly-shaped pigment dystrophy of the fovea caused by a point mutation in codon 167 of the RDS gene." Nichols B.E., Sheffield V.C., Vandenburgh K., Drack A.V., Kimura A.E., Stone E.M. Nat. Genet. 3:202-207(1993) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT PDREP ASP-167. |
| [11] | "Mutations in the human retinal degeneration slow (RDS) gene can cause either retinitis pigmentosa or macular dystrophy." Wells J., Wroblewski J., Keen J., Inglehearn C., Jubb C., Eckstein A., Jay M., Arden G., Bhattacharya S., Fitzke F. Nat. Genet. 3:213-218(1993) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANTS GLN-172 AND TRP-172. |
| [12] | "Choroidal neovascularization in a patient with adult foveomacular dystrophy and a mutation in the retinal degeneration slow gene (Pro 210 Arg)." Feist R.M., White M.F. Jr., Skalka H., Stone E.M. Am. J. Ophthalmol. 118:259-260(1994) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT FOVEOMACULAR DYSTROPHY ARG-210. |
| [13] | "A novel mutation (Asn244Lys) in the peripherin/RDS gene causing autosomal dominant retinitis pigmentosa associated with bull's-eye maculopathy detected by nonradioisotopic SSCP." Kikawa E., Nakazawa M., Chida Y., Shiono T., Tamai M. Genomics 20:137-139(1994) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT RP7 LYS-244. |
| [14] | "A point mutation in the RDS-peripherin gene in a Spanish family with central areolar choroidal dystrophy." Reig C., Serra A., Gean E., Vidal M., Arumi J., De la Calzada M.D., Antich J., Carballo M. Ophthalmic Genet. 16:39-44(1995) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT TRP-172. |
| [15] | Erratum Reig C., Serra A., Gean E., Vidal M., Arumi J., De la Calzada M.D., Antich J., Carballo M. Ophthalmic Genet. 16:179-179(1995) |
| [16] | "A peripherin/retinal degeneration slow mutation (Pro-210-Arg) associated with macular and peripheral retinal degeneration." Gorin M.B., Jackson K.E., Ferrell R.E., Sheffield V.C., Jacobson S.G., Gass J.D., Mitchell E., Stone E.M. Ophthalmology 102:246-255(1995) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT RP7 ARG-210. |
| [17] | "Adult vitelliform macular dystrophy is frequently associated with mutations in the peripherin/RDS gene." Felbor U., Schilling H., Weber B.H.F. Hum. Mutat. 10:301-309(1997) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANTS AVMD THR-212; ILE-268 AND ASP-305. |
| [18] | "Founder effect, seen in the British population, of the 172 peripherin/RDS mutation- and further refinement of genetic positioning of the peripherin/RDS gene." Payne A.M., Downes S.M., Bessant D.A.R., Bird A.C., Bhattacharya S.S. Am. J. Hum. Genet. 62:192-195(1998) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANTS PDREP ARG-210; ARG-213 AND TRP-220, VARIANTS MACULAR DYSTROPHY TRP-172 AND ARG-219. |
| [19] | "P313L: a novel amino acid substitution within the C-terminal domain of the human RDS/peripherin gene." Ruiz A., Borrego S., Sanchez J., Antinolo G. Hum. Mutat. 11:415-416(1998) Cited for: VARIANT LEU-313. |
| [20] | "Three novel RDS-peripherin mutations (689delT, 857del17, G208D) in Spanish families affected with autosomal dominant retinal degenerations." Trujillo M.J., Bueno J., Osorio A., Sanz R., Garcia-Sandoval B., Ramos C., Ayuso C. Hum. Mutat. 12:70-70(1998) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT RP7 ASP-208. |
| [21] | "A peculiar autosomal dominant macular dystrophy caused by an asparagine deletion at codon 169 in the peripherin/RDS gene." van Lith-Verhoeven J.J., van den Helm B., Deutman A.F., Bergen A.A., Cremers F.P., Hoyng C.B., de Jong P.T. Arch. Ophthalmol. 121:1452-1457(2003) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT MACULAR DYSTROPHY ASN-169 DEL. |
| [22] | "A novel mutation in the RDS gene in an Italian family with pattern dystrophy." Testa F., Marini V., Rossi S., Interlandi E., Nesti A., Rinaldi M., Varano M., Garre C., Simonelli F. Br. J. Ophthalmol. 89:1066-1068(2005) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT PDREP SER-167. |
| [23] | "Clinical findings in a multigeneration family with autosomal dominant central areolar choroidal dystrophy associated with an Arg195Leu mutation in the peripherin/RDS gene." Keilhauer C.N., Meigen T., Weber B.H. Arch. Ophthalmol. 124:1020-1027(2006) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT CACD2 LEU-195. |
| [24] | "Next-generation genetic testing for retinitis pigmentosa." Neveling K., Collin R.W., Gilissen C., van Huet R.A., Visser L., Kwint M.P., Gijsen S.J., Zonneveld M.N., Wieskamp N., de Ligt J., Siemiatkowska A.M., Hoefsloot L.H., Buckley M.F., Kellner U., Branham K.E., den Hollander A.I., Hoischen A., Hoyng C. Scheffer H.Hum. Mutat. 33:963-972(2012) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT RP7 TRP-142. |
| + | Additional computationally mapped references. |
Web resources
| Mutations of the RDS gene Retina International's Scientific Newsletter |
| GeneReviews |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | M73531 mRNA. Translation: AAA60260.1. U07149, U07147, U07148 Genomic DNA. Translation: AAA16958.1. AL049843 Genomic DNA. Translation: CAB75420.1. BC074720 mRNA. Translation: AAH74720.1. |
| IPI | IPI00013928. |
| PIR | A40308. |
| RefSeq | NP_000313.2. NM_000322.4. |
| UniGene | Hs.654489. |
3D structure databases | |
| ModBase | Search... |
Protein-protein interaction databases | |
| STRING | 9606.ENSP00000230381. |
PTM databases | |
| PhosphoSite | P23942. |
Polymorphism databases | |
| DMDM | 132212. |
Proteomic databases | |
| PaxDb | P23942. |
| PRIDE | P23942. |
Protocols and materials databases | |
| DNASU | 5961. |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENST00000230381; ENSP00000230381; ENSG00000112619. |
| GeneID | 5961. |
| KEGG | hsa:5961. |
| UCSC | uc003osk.3. human. |
Organism-specific databases | |
| CTD | 5961. |
| GeneCards | GC06M042664. |
| H-InvDB | HIX0025091. |
| HGNC | HGNC:9942. PRPH2. |
| HPA | HPA029458. |
| MIM | 136880. phenotype. 169150. phenotype. 179605. gene. 268000. phenotype. 608133. phenotype. 608161. phenotype. 613105. phenotype. |
| neXtProt | NX_P23942. |
| Orphanet | 99000. Adult-onset foveomacular vitelliform dystrophy. 99001. Butterfly-shaped pigment dystrophy. 75377. Central areolar choroidal dystrophy. 1872. Cone rod dystrophy. 227796. Fundus albipunctatus. 791. Retinitis pigmentosa. 52427. Retinitis punctata albescens. |
| PharmGKB | PA34310. |
| GenAtlas | Search... |
Phylogenomic databases | |
| eggNOG | NOG237707. |
| HOGENOM | HOG000026780. |
| HOVERGEN | HBG004964. |
| InParanoid | P23942. |
| KO | K07607. |
| OrthoDB | EOG41VK37. |
Gene expression databases | |
| Bgee | P23942. |
| CleanEx | HS_PRPH. HS_PRPH2. |
| Genevestigator | P23942. |
| GermOnline | ENSG00000112619. Homo sapiens. |
Family and domain databases | |
| InterPro | IPR000830. Peripherin/rom-1. IPR018498. Peripherin/rom-1_CS. IPR018499. Tetraspanin/Peripherin. IPR008952. Tetraspanin_EC2. [Graphical view] |
| Pfam | PF00335. Tetraspannin. 1 hit. [Graphical view] |
| PRINTS | PR00218. PERIPHERNRDS. |
| SUPFAM | SSF48652. Tetraspanin. 1 hit. |
| PROSITE | PS00930. RDS_ROM1. 1 hit. [Graphical view] |
| ProtoNet | Search... |
Other | |
| GenomeRNAi | 5961. |
| NextBio | 23208. |
| SOURCE | Search... |
Entry information
| Entry name | PRPH2_HUMAN | ||||||||
| Accession | Primary (citable) accession number: P23942 Secondary accession number(s): Q5TFH5, Q6DK65 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
| Disclaimer | Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. | ||||||||
Relevant documents
| Human chromosome 6 Human chromosome 6: entries, gene names and cross-references to MIM |
| Human entries with polymorphisms or disease mutations List of human entries with polymorphisms or disease mutations |
| Human polymorphisms and disease mutations Index of human polymorphisms and disease mutations |
| MIM cross-references Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with
