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SORL1 information


SORL1
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesSORL1, sortilin-related receptor, L(DLR class) A repeats containing, C11orf32, LR11, LRP9, SORLA, SorLA-1, gp250, sortilin related receptor 1
External IDsOMIM: 602005; MGI: 1202296; HomoloGene: 2336; GeneCards: SORL1; OMA:SORL1 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_003105

NM_011436
NM_001357261

RefSeq (protein)

NP_003096

NP_035566
NP_001344190

Location (UCSC)Chr 11: 121.45 – 121.63 MbChr 9: 41.88 – 42.04 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse
Schematic diagram of the multiple domains of SORLA, the protein product of the SORL1 gene. The relative orientations of the domains are drawn to match the ectodomain model of Jensen et al., PNAS (2023), which is also shown on the next figure. From Holstege et al., medRxiv (2023).
Schematic and structure model of the ectodomain of SORLA/SORL1, plus its two dimer interfaces in the middle panel, followed by the way the two interfaces can combine to form a polymeric network and how that network can underlie and stabilize the network of retromer arches on the other side of the tubular membrane. From Jensen et al., PNAS (2023). Atomic coordinates of the ectodomain model are available at https://modelarchive.org/doi/10.5452/ma-zgbg4
A model of the endosome tubule showing the characteristic retromer arch polymer wrapping around the outer (cytoplasmic) side and the ectodomain of SORL1 forming a supporting polymeric network inside. The interior SORL1 network is anchored to retromer by a transmembrane helix and a short C-terminal domain that binds to VPS26 (dark green) on the outside.

Sortilin-related receptor, L(DLR class) A repeats containing is a protein that in humans is encoded by the SORL1 gene.[5]

SORL1 (also known as SORLA, SORLA1, or LR11; SORLA or SORL1 are used, often interchangeably, for the protein product of the SORL1 gene) is a 2214 residue type I transmembrane protein receptor that binds certain peptides and integral membrane protein cargo in the endolysosomal pathway and delivers them for sorting to the retromer multi protein complex;[6] the gene is predominantly expressed in the central nervous system.[7] Endosomal traffic jams linked to SORL1 retromer dysfunction are the earliest cellular pathology in both familial and the more common sporadic Alzheimer’s patients.[8][9]

Retromer regulates protein trafficking from the early endosome either back to the trans-Golgi (retrograde) or back to the plasma membrane (direct recycling).[10] Two forms of retromer are known: the VPS26A retromer and the VPS26B retromer, the latter being dedicated to direct recycling in the CNS.[11] SORL1 is a multi domain single-pass membrane protein whose large ectodomain resides primarily in endosomal tubules, being connected by its transmembrane helical domain and cytoplasmic tail to the VPS26 retromer subunit on the outer endosomal membrane.[12]

The age at onset of SORL1 mutation carriers varies, which has complicated segregation analyses. Nevertheless, protein−truncating variants (PTVs) are observed almost exclusively in AD patients,[13] indicating that SORL1 is haploinsufficient.[14] However, most variants are rare missense variants that can be benign, or risk−increasing, but recent reports have indicated that some variants are causative for disease.[15][16] In fact, specific missense variants have been observed only in AD cases, some of which may have a dominant negative effect.[17].[1] [2]

ALZFORUM has created an interactive web page that maps all of the currently known variants onto the schematic of the SORLA domain structure shown in the Figure on the right, along with information for each one. It can be accessed at https://www.alzforum.org/mutations/sorl1

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000137642 – Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000049313 – Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ "Entrez Gene: Sortilin-related receptor, L(DLR class) A repeats containing".
  6. ^ Small SA, Petsko GA (March 2015). "Retromer in Alzheimer disease, Parkinson disease and other neurological disorders". Nature Reviews. Neuroscience. 16 (3): 126–132. doi:10.1038/nrn3896. PMID 25669742. S2CID 5166260.
  7. ^ Szabo MP, Mishra S, Knupp A, Young JE (January 2022). "The role of Alzheimer's disease risk genes in endolysosomal pathways". Neurobiology of Disease. 162: 105576. doi:10.1016/j.nbd.2021.105576. PMC 9071255. PMID 34871734.
  8. ^ Cataldo AM, Peterhoff CM, Troncoso JC, Gomez-Isla T, Hyman BT, Nixon RA (July 2000). "Endocytic pathway abnormalities precede amyloid beta deposition in sporadic Alzheimer's disease and Down syndrome: differential effects of APOE genotype and presenilin mutations". The American Journal of Pathology. 157 (1): 277–286. doi:10.1016/S0002-9440(10)64538-5. PMC 1850219. PMID 10880397.
  9. ^ Small SA, Simoes-Spassov S, Mayeux R, Petsko GA (October 2017). "Endosomal Traffic Jams Represent a Pathogenic Hub and Therapeutic Target in Alzheimer's Disease". Trends in Neurosciences. 40 (10): 592–602. doi:10.1016/j.tins.2017.08.003. PMC 5654621. PMID 28962801.
  10. ^ Carosi JM, Denton D, Kumar S, Sargeant TJ (2023). "Receptor Recycling by Retromer". Molecular and Cellular Biology. 43 (7): 317–334. doi:10.1080/10985549.2023.2222053. PMC 10348044. PMID 37350516.
  11. ^ Simoes S, Guo J, Buitrago L, Qureshi YH, Feng X, Kothiya M, et al. (December 2021). "Alzheimer's vulnerable brain region relies on a distinct retromer core dedicated to endosomal recycling". Cell Reports. 37 (13): 110182. doi:10.1016/j.celrep.2021.110182. PMC 8792909. PMID 34965419.
  12. ^ Lane RF, St George-Hyslop P, Hempstead BL, Small SA, Strittmatter SM, Gandy S (October 2012). "Vps10 family proteins and the retromer complex in aging-related neurodegeneration and diabetes". The Journal of Neuroscience. 32 (41): 14080–14086. doi:10.1523/JNEUROSCI.3359-12.2012. PMC 3576841. PMID 23055476.
  13. ^ Holstege, Henne; van der Lee, Sven J.; Hulsman, Marc; Wong, Tsz Hang; van Rooij, Jeroen GJ; Weiss, Marjan; Louwersheimer, Eva; Wolters, Frank J.; Amin, Najaf; Uitterlinden, André G.; Hofman, Albert; Ikram, M. Arfan; van Swieten, John C.; Meijers-Heijboer, Hanne; van der Flier, Wiesje M. (2017). "Characterization of pathogenic SORL1 genetic variants for association with Alzheimer's disease: a clinical interpretation strategy". European Journal of Human Genetics. 25 (8): 973–981. doi:10.1038/ejhg.2017.87. ISSN 1476-5438. PMC 5567154. PMID 28537274.
  14. ^ Verheijen, Jan; Van den Bossche, Tobi; van der Zee, Julie; Engelborghs, Sebastiaan; Sanchez-Valle, Raquel; Lladó, Albert; Graff, Caroline; Thonberg, Håkan; Pastor, Pau; Ortega-Cubero, Sara; Pastor, Maria A.; Benussi, Luisa; Ghidoni, Roberta; Binetti, Giuliano; Clarimon, Jordi (2016). "A comprehensive study of the genetic impact of rare variants in SORL1 in European early-onset Alzheimer's disease". Acta Neuropathologica. 132 (2): 213–224. doi:10.1007/s00401-016-1566-9. ISSN 1432-0533. PMC 4947104. PMID 27026413.
  15. ^ Fazeli E, Child DD, Bucks SA, Stovarsky M, Edwards G, Yu CE, et al. (July 2023). "A familial missense variant in the AD gene SORL1 impairs its maturation and endosomal sorting". bioRxiv: 2023.07.01.547348. doi:10.1101/2023.07.01.547348. PMC 10349966. PMID 37461597.
  16. ^ Jensen AM, Raska J, Fojtik P, Monti G, Lunding M, Vochyanova S, et al. (2023). "The SORL1 p. Y1816C variant causes impaired endosomal dimerization and autosomal dominant Alzheimer's disease". medRxiv 10.1101/2023.07.09.23292253v1.
  17. ^ Holstege, Henne; De Waal, Matthijs W. J.; Tesi, Niccolo; Van Der Lee, Sven J.; ADES-consortium; ADSP consortium; StEP-AD consortium; Knight-ADRC; UCSF/NYGC/UAB (2023). "Effect of prioritized SORL1 missense variants supports clinical consideration for familial Alzheimer's Disease" (Report). Genetic and Genomic Medicine. doi:10.1101/2023.07.13.23292622.

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