KDM1A

KDM1A
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesKDM1A, AOF2, BHC110, KDM1, LSD1, CPRF, lysine demethylase 1A
External IDsOMIM: 609132; MGI: 1196256; HomoloGene: 32240; GeneCards: KDM1A; OMA:KDM1A - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_001009999
NM_015013
NM_001363654

NM_133872
NM_001347221
NM_001356567

RefSeq (protein)

NP_001009999
NP_055828
NP_001350583

NP_001334150
NP_598633
NP_001343496

Location (UCSC)Chr 1: 23.02 – 23.08 MbChr 4: 136.28 – 136.33 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

Lysine-specific histone demethylase 1A (LSD1) also known as lysine (K)-specific demethylase 1A (KDM1A) is a protein that in humans is encoded by the KDM1A gene.[5] LSD1 is a flavin-dependent monoamine oxidase, which can demethylate mono- and di-methylated lysines, specifically histone 3, lysine 4 (H3K4). Other reported methylated lysine substrates such as histone H3K9 and TP53 have not been biochemically validated.[6] This enzyme plays a critical role in oocyte growth, embryogenesis, hematopoiesis and tissue-specific differentiation.[7] LSD1 was the first histone demethylase to be discovered though more than 30 have since been described.[8]

Structure

This gene encodes a nuclear protein containing a SWIRM domain, a FAD-binding motif, and an amine oxidase domain. This protein is a component of several complexes that include histone deacetylase and DNA methytransferase 1, all of which are associated with the repression of gene transcription. It is now known the LSD1 complex mediates a coordinated histone modification switch through these various enzymatic activities which in turn are recognized by histone "readers". The methylation of histone H3 at K4 can affect both the transcription of DNA and its replication.

Mechanism of Catalysis and Protein Function

LSD1 (lysine-specific demethylase 1), through a FAD-dependent oxidative reaction, specifically removes histone H3K4me2 to H3K4me1 or H3K4me0, but not H3K4me3.

The first step of the LSD1 catalytic reaction is the abstraction of hydride from the methyl of the H3K4 side chain N-methyl by FAD in the oxidized state that generates a stabilized methylene iminium ion. This is then hydrolyzed by a water molecule to give an unstable vicinal terminal hydroxyl amine that rapidly decomposes to yield the de-methylated lysine H3K4 molecule and formaldehyde. FAD is the reduced state reacts with molecular oxygen forming a covalent mono-hydroperoxide adduct which is then hydrolyzed by water to yield hydrogen peroxide regenerating the more stable FAD oxidized (resting) state. A highly conserved lysine (Lys661 in LSD1) at the active site in FAD-dependent amine oxidases is believed to assist in this reaction. The overall reaction stoichiometry thus involves the conversion of an N-methyl group by water and oxygen to give molecules of formaldehyde, hydrogen peroxide, and the product N-H terminus.

LSD1 cannot demethylate H3K4 trimethyl (N-tri-methyl-lysine) because the initial iminium species cannot be formed owing to a lack of an available lone electron pair at the N-center, essential for formation of the requisite stabilizing pi-system.

Given this mechanism, the mutant LSD1 with the Lys661Ala substitution is unlikely to adversely impact the interaction of LSD1 with various substrates, but rather leads to less efficient flavin recycling, which presumably then proceeds at the whim of any available non-specifically bound substitute water around that face of the FAD binding site. Thus, a mutation affecting K661 does retain some demethylase activity.

Even the structures of LSD1 at a 5 Å resolution clearly show how wide-ranging the protein-protein interactions are spread over the LSD1 Tower and SWIRN regions.

One method to examine the function of the LSD1 protein is to reduced the KDM1A mRNA using a specific silencing RNA, so called siRNA knockdown.[9] By this method, the loss of function shows a dependence of both hematopoietic stem and progenitor cells on LSD1 for self-renewal and maturation to fully differentiated blood cells. The interaction of LSD1 with the transcription factor GFI1B is particularly important for regulating the balance in stem cells between replication and self-renewal as well as the maturation the megakaryocyte-erythroid progenitors to megakaryocytes.

A complementary method to the "knockdown" method is pharmacologic inhibition of LSD1; many such inhibitors such as bomedemstat do not abrogate the scaffold function of LSD1 but rather inhibit the enzymatic activity as well as the ability of the LSD1 complex to bind transcription factors in the SNAIL family, most specifically GFI1 and GFI1B. Thus, these pharmacologic inhibitors have their greatest clinical utility in the treatment of hematologic diseases in which disruption of the LSD1-GFI1B or LSD1-GFI1 interaction is the therapeutic thesis for treatment.

Interactions

LSD1 has many different protein binding partners in a cell- and developmentally-specific manner. Both its enzymatic activity and function as a scaffold are important depending on the cellular context. Indeed, in acute myeloid leukemia (AML), the interaction of LSD1 and GFI1B was definitively demonstrated to be necessary for the proliferation of leukemic initiating cells, while the LSD1 demethylase activity was not essential for this phenotype.[10]

LSD1 can be a subunit of the NuRD complex and, and as such, participates in the gene expression programs associated with metastasis in breast cancer.[11] There is also evidence that the interaction of LSD1 with nuclear GSK3β facilitates progression of certain cancers. High levels of nuclear GSK3β were found to promote the binding of LSD1 to the deubiquitinase, USP22, which prevented the degradation of LSD1 allowing LSD1 to accumulate to high levels. The accumulation of LSD1 has been correlated with tumor progression in certain cancers, including glioblastoma, leukemia, and osteosarcoma.[12]

Role in development

LSD1 appears to play an important role in the epigenetic "reprogramming" that occurs when sperm and egg unite to form the zygote.[13][14] Deletion of KDM1A impairs the growth and differentiation of embryonic stem cells.[15] Deletion of the mouse ortholog, Kdm1a, has an embryonic lethal phenotype; embryos do not progress beyond gestational Day 7.5.[16][17]

Clinical significance

As mentioned above, in several cancers, higher levels of expression of LSD1 are correlated with poorer outcomes suggesting LSD1 inhibition could be a part of an anti-neoplastic regimen.[18][19] KDM1A has been found to be overexpressed in bladder, lung, and colorectal cancers.[20] Inhibitors of LSD1 are being clinically tested for the treatment of extensive-disease small cell lung cancer, castrate-resistant prostate cancer, and acute meyloid leukemia.[21][22] Catalytic inhibitors of LSD1 such as bomedemstat, iadademstat, phenelzine, pulrodemstat, seclidemstat, and tranylcypromine are in clinical development for the treatment of hematologic malignancies including acute meyloid leukemeia and, for bomedemstat, the myeloproliferative neoplasms.[21] Given LSD1 is critical for the maturation of megakaryocytes, the bone marrow cells that produce platelets, LSD1 is well-suited as a target for the treatment of essential thrombocythemia, an indication currently in development for bomedemstat by Imago BioSciences. Inc.

Mutations

De novo mutations in KDM1A have been reported in three patients with developmental delays complementing reports that loss-of-function mutations in SETD1A, a histone H3K4 methyltransferase, contributes to the risk of schizophrenia.[23][24] All documented mutations are missense substitutions.[25][26][27] LSD1 is rarely found to be mutated in cancer.

See also

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000004487Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000036940Ensembl, 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: Lysine (K)-specific demethylase 1A".
  6. ^ Rudolph T, Beuch S, Reuter G (August 2013). "Lysine-specific histone demethylase LSD1 and the dynamic control of chromatin". (review). Biological Chemistry. 394 (8): 1019–1028. doi:10.1515/hsz-2013-0119. PMID 23612539. S2CID 41459906.
  7. ^ Pedersen MT, Helin K (November 2010). "Histone demethylases in development and disease". (review). Trends in Cell Biology. 20 (11): 662–671. doi:10.1016/j.tcb.2010.08.011. PMID 20863703.
  8. ^ Shi Y, Lan F, Matson C, Mulligan P, Whetstine JR, Cole PA, et al. (December 2004). "Histone demethylation mediated by the nuclear amine oxidase homolog LSD1". Cell. 119 (7): 941–953. doi:10.1016/j.cell.2004.12.012. PMID 15620353. S2CID 10847230.
  9. ^ Munkácsy G, Sztupinszki Z, Herman P, Bán B, Pénzváltó Z, Szarvas N, Győrffy B (September 2016). "Validation of RNAi Silencing Efficiency Using Gene Array Data shows 18.5% Failure Rate across 429 Independent Experiments". Molecular Therapy. Nucleic Acids. 5 (9): e366. doi:10.1038/mtna.2016.66. PMC 5056990. PMID 27673562.
  10. ^ Vinyard ME, Su C, Siegenfeld AP, Waterbury AL, Freedy AM, Gosavi PM, et al. (May 2019). "CRISPR-suppressor scanning reveals a nonenzymatic role of LSD1 in AML". Nature Chemical Biology. 15 (5): 529–539. doi:10.1038/s41589-019-0263-0. PMC 7679026. PMID 30992567.
  11. ^ Wang Y, Zhang H, Chen Y, Sun Y, Yang F, Yu W, et al. (August 2009). "LSD1 is a subunit of the NuRD complex and targets the metastasis programs in breast cancer". Cell. 138 (4): 660–672. doi:10.1016/j.cell.2009.05.050. PMID 19703393.
  12. ^ Zhou A, Lin K, Zhang S, Chen Y, Zhang N, Xue J, et al. (September 2016). "Nuclear GSK3β promotes tumorigenesis by phosphorylating LSD1 and inducing its deubiquitylation by USP22". Nature Cell Biology. 18 (9): 954–966. doi:10.1038/ncb3396. PMC 5026327. PMID 27501329.
  13. ^ Ancelin K, Syx L, Borensztein M, Ranisavljevic N, Vassilev I, Briseño-Roa L, et al. (February 2016). "Maternal LSD1 is an essential regulator of chromatin and transcription landscapes during zygotic genome activation". eLife. 5. doi:10.7554/eLife.08851. PMC 4829419. PMID 26836306.
  14. ^ "Disruptions to embryonic reprogramming alter adult mouse behavior". phys.org. Retrieved 2016-06-01.
  15. ^ Amente S, Lania L, Majello B (October 2013). "The histone LSD1 demethylase in stemness and cancer transcription programs". Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms. 1829 (10): 981–986. doi:10.1016/j.bbagrm.2013.05.002. PMID 23684752.
  16. ^ Wang J, Hevi S, Kurash JK, Lei H, Gay F, Bajko J, et al. (January 2009). "The lysine demethylase LSD1 (KDM1) is required for maintenance of global DNA methylation". Nature Genetics. 41 (1): 125–129. doi:10.1038/ng.268. PMID 19098913. S2CID 2010695.
  17. ^ Wang J, Scully K, Zhu X, Cai L, Zhang J, Prefontaine GG, et al. (April 2007). "Opposing LSD1 complexes function in developmental gene activation and repression programmes". Nature. 446 (7138): 882–887. Bibcode:2007Natur.446..882W. doi:10.1038/nature05671. PMID 17392792. S2CID 4387240.
  18. ^ Kahl P, Gullotti L, Heukamp LC, Wolf S, Friedrichs N, Vorreuther R, et al. (December 2006). "Androgen receptor coactivators lysine-specific histone demethylase 1 and four and a half LIM domain protein 2 predict risk of prostate cancer recurrence". Cancer Research. 66 (23): 11341–11347. doi:10.1158/0008-5472.CAN-06-1570. PMID 17145880.
  19. ^ Lim S, Janzer A, Becker A, Zimmer A, Schüle R, Buettner R, Kirfel J (March 2010). "Lysine-specific demethylase 1 (LSD1) is highly expressed in ER-negative breast cancers and a biomarker predicting aggressive tumor behavior". Carcinogenesis. 31 (3): 512–520. doi:10.1093/carcin/bgp324. PMID 20042638.
  20. ^ Hayami S, Kelly JD, Cho HS, Yoshimatsu M, Unoki M, Tsunoda T, et al. (February 2011). "Overexpression of LSD1 contributes to human carcinogenesis through chromatin regulation in various cancers". International Journal of Cancer. 128 (3): 574–586. doi:10.1002/ijc.25349. PMID 20333681. S2CID 26990673.
  21. ^ a b Noce B, Di Bello E, Fioravanti R, Mai A (2023). "LSD1 inhibitors for cancer treatment: Focus on multi-target agents and compounds in clinical trials". (review). Frontiers in Pharmacology. 14: 1120911. doi:10.3389/fphar.2023.1120911. PMC 9932783. PMID 36817147.
  22. ^ Zhang C, Wang Z, Shi Y, Yu B, Song Y (May 2023). "Recent advances of LSD1/KDM1A inhibitors for disease therapy". (review). Bioorganic Chemistry. 134: 106443. doi:10.1016/j.bioorg.2023.106443. PMID 36857932. S2CID 257215939.
  23. ^ Aleccia JN (7 May 2016). "Needle in the genetic haystack: How a new UW website is helping families, scientists". The Seattle Times. Retrieved 27 May 2016.
  24. ^ Snow K (31 May 2016). "Stirrings of Hope for Families Isolated by Rarest of Genetic Conditions". KQED Future of You. Retrieved 2016-06-01.
  25. ^ Tunovic S, Barkovich J, Sherr EH, Slavotinek AM (July 2014). "De novo ANKRD11 and KDM1A gene mutations in a male with features of KBG syndrome and Kabuki syndrome". American Journal of Medical Genetics. Part A. 164A (7): 1744–1749. doi:10.1002/ajmg.a.36450. PMID 24838796. S2CID 24307221.
  26. ^ Chong JX, Yu JH, Lorentzen P, Park KM, Jamal SM, Tabor HK, et al. (August 2016). "Gene discovery for Mendelian conditions via social networking: de novo variants in KDM1A cause developmental delay and distinctive facial features". Genetics in Medicine. 18 (8): 788–795. doi:10.1038/gim.2015.161. PMC 4902791. PMID 26656649.
  27. ^ Pilotto S, Speranzini V, Marabelli C, Rusconi F, Toffolo E, Grillo B, et al. (June 2016). "LSD1/KDM1A mutations associated to a newly described form of intellectual disability impair demethylase activity and binding to transcription factors". Human Molecular Genetics. 25 (12): 2578–2587. doi:10.1093/hmg/ddw120. hdl:2434/425127. PMID 27094131.

This article incorporates text from the United States National Library of Medicine, which is in the public domain.

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