LVRN

gene
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Also known as APQFLJ90650AQPEPTAQPEP

Summary

LVRN (laeverin, HGNC:26904) is a protein-coding gene on chromosome 5q23.1, encoding Aminopeptidase Q (Q6Q4G3). Metalloprotease which may be important for placentation by regulating biological activity of key peptides at the embryo-maternal interface.

Predicted to enable metalloaminopeptidase activity; peptide binding activity; and zinc ion binding activity. Predicted to be involved in peptide catabolic process and proteolysis. Predicted to be active in cytoplasm; extracellular space; and membrane.

Source: NCBI Gene 206338 — RefSeq curated summary.

At a glance

  • GWAS associations: 5
  • Clinical variants (ClinVar): 147 total
  • Druggable target: yes
  • MANE Select transcript: NM_173800

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:26904
Approved symbolLVRN
Namelaeverin
Location5q23.1
Locus typegene with protein product
StatusApproved
AliasesAPQ, FLJ90650, AQPEP, TAQPEP
Ensembl geneENSG00000172901
Ensembl biotypeprotein_coding
OMIM610046
Entrez206338

Gene structure

Transcript identifiers

Ensembl transcripts: 9 — 4 nonsense_mediated_decay, 2 protein_coding_CDS_not_defined, 2 retained_intron, 1 protein_coding

ENST00000357872, ENST00000503203, ENST00000503329, ENST00000504467, ENST00000506279, ENST00000512314, ENST00000512413, ENST00000514509, ENST00000515454

RefSeq mRNA: 1 — MANE Select: NM_173800 NM_173800

CCDS: CCDS4124

Canonical transcript exons

ENST00000357872 — 20 exons

ExonStartEnd
ENSE00000972254116000433116000498
ENSE00000972255116000593116000658
ENSE00000972256116001067116001239
ENSE00001274418116010741116010894
ENSE00001274423116005912116005967
ENSE00001274429116003241116003380
ENSE00001274433116002835116002911
ENSE00001861823115962475115963312
ENSE00001884161116025978116027606
ENSE00003485355116012374116012468
ENSE00003489055116014420116014527
ENSE00003509105116022391116022466
ENSE00003570164116015628116015765
ENSE00003599275115999762115999902
ENSE00003647972116015252116015419
ENSE00003733475115993741115993854
ENSE00003734503115983287115983429
ENSE00003742736115992123115992277
ENSE00003744025115984570115984709
ENSE00003750313115987813115987939

Expression profiles

Bgee: expression breadth ubiquitous, 160 present calls, max score 94.50.

FANTOM5 (CAGE): breadth tissue_specific, TPM avg 0.6554 / max 245.6195, expressed in 91 samples.

FANTOM5 promoters (6 alternative TSS)

Promoter IDTPM avgSamples expressed
580590.353142
580580.084617
580610.077045
580600.061212
580620.051328
580570.028312

Top tissues by expression

251 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
deciduaUBERON:000245094.50gold quality
subcutaneous adipose tissueUBERON:000219090.45gold quality
calcaneal tendonUBERON:000370188.75gold quality
placentaUBERON:000198788.00gold quality
adipose tissueUBERON:000101387.98gold quality
omental fat padUBERON:001041485.26gold quality
peritoneumUBERON:000235885.18gold quality
adipose tissue of abdominal regionUBERON:000780885.12gold quality
male germ line stem cell (sensu Vertebrata) in testisCL:0000089 ∩ UBERON:000047384.69gold quality
mucosa of stomachUBERON:000119980.73gold quality
esophagogastric junction muscularis propriaUBERON:003584174.86gold quality
skin of legUBERON:000151174.67gold quality
lower esophagus muscularis layerUBERON:003583374.32gold quality
lower esophagusUBERON:001347374.14gold quality
right ovaryUBERON:000211873.72gold quality
left coronary arteryUBERON:000162673.35gold quality
tendonUBERON:000004373.24gold quality
skin of abdomenUBERON:000141672.88gold quality
coronary arteryUBERON:000162172.41gold quality
left ovaryUBERON:000211972.25gold quality
zone of skinUBERON:000001471.84gold quality
layer of synovial tissueUBERON:000761671.81gold quality
small intestine Peyer’s patchUBERON:000345470.97gold quality
gastrocnemiusUBERON:000138870.95gold quality
right coronary arteryUBERON:000162570.79gold quality
muscle of legUBERON:000138370.56gold quality
hindlimb stylopod muscleUBERON:000425270.33gold quality
small intestineUBERON:000210868.49gold quality
skin of hipUBERON:000155468.39gold quality
descending thoracic aortaUBERON:000234568.33gold quality

Single-cell (SCXA)

Detected in 2 experiment(s), a significant marker in 2.

ExperimentMarker?Max mean expression
E-MTAB-6678yes17.67
E-ANND-3yes9.91

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

98 targeting LVRN, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-5692B100.0071.322622
HSA-MIR-5692C100.0071.322622
HSA-MIR-4789-5P99.9870.762721
HSA-MIR-512-3P99.9767.351049
HSA-MIR-6888-3P99.9765.951170
HSA-MIR-548AB99.9571.313488
HSA-MIR-55999.9572.283609
HSA-MIR-548AD-5P99.9471.233502
HSA-MIR-548AE-5P99.9471.233502
HSA-MIR-548AY-5P99.9471.233502
HSA-MIR-548B-5P99.9471.233502
HSA-MIR-548D-5P99.9471.233502
HSA-MIR-548A-5P99.9471.273482
HSA-MIR-548AK99.9471.243488
HSA-MIR-548AM-5P99.9471.243488
HSA-MIR-548AP-5P99.9471.143489
HSA-MIR-548AQ-5P99.9471.343426
HSA-MIR-548AR-5P99.9471.283515
HSA-MIR-548AS-5P99.9471.223482
HSA-MIR-548AU-5P99.9471.243488
HSA-MIR-548BB-5P99.9471.273509
HSA-MIR-548C-5P99.9471.243488
HSA-MIR-548H-5P99.9471.243488
HSA-MIR-548I99.9471.253481
HSA-MIR-548J-5P99.9471.143489
HSA-MIR-548O-5P99.9471.243488
HSA-MIR-548W99.9471.243488
HSA-MIR-548Y99.9471.283514
HSA-MIR-381-3P99.9371.872854
HSA-MIR-6721-5P99.9368.922981

Literature-anchored findings (GeneRIF, showing 12)

  • Extravillous trophoblasts express laeverin, a novel protein that belongs to membrane-bound gluzincin metallopeptidases(laeverin) (PMID:14706636)
  • A novel membrane-bound cell surface peptidase, laeverin (FLJ90650), was found to be specifically expressed on extravillous trophoblasts that had almost ceased invasion into maternal decidual tissues. (PMID:15897020)
  • The 3 most significantly overexpressed genes in rheumatoid arthritis were laeverin, 11beta-hydroxysteroid dehydrogenase type 2 (a steroid pathway enzyme), and cysteine-rich, angiogenic inducer 61 (a known angiogenic factor). (PMID:16804865)
  • is a novel bestatin-sensitive leucine aminopeptidase; plays important roles in human placentation by regulating biological activity of key peptides at the embryo-maternal interface (PMID:17525158)
  • These results indicate that His(379) of laeverin plays essential roles in its distinctive enzymatic properties and contributes to maintaining the appropriate structure of the catalytic cavity of the enzyme. (PMID:19819873)
  • Replacement of glutamine-238 with alanine caused a significant change in substrate specificity rather than a decrease in enzymatic activity. (PMID:21212512)
  • Laeverin is a specific cell-surface marker for human extravillous trophoblast (EVT) and plays a regulatory role in EVT migration. (PMID:22402206)
  • In preeclamptic placentas, laeverin is experssed in the cytoplasm and microvesicles, rather than the cell membrane. Laeverin appears to be involved in trophoblast cell migration and invasion through interaction with integrins and matrix metalloprotease 1. (PMID:24959655)
  • Laeverin is expressed in all trophoblast cell types of normal and preeclamptic placentas. Expression pattern of laeverin in trophoblast cells is heterogeneous and not necessarily membrane-bound. (PMID:29355889)
  • First trimester maternal serum laeverin level cannot be used to predict preeclampsia. (PMID:29681208)
  • Overexpression of LVRN impedes the invasion of trophoblasts by inhibiting epithelial-mesenchymal transition. (PMID:33355358)
  • PRG2 and AQPEP are misexpressed in fetal membranes in placenta previa and percretadagger. (PMID:33982062)

Cross-species orthologs

20 orthologs

OrganismSymbolGene ID
danio_rerioanpeplbENSDARG00000041083
danio_rerioanpeplaENSDARG00000089706
mus_musculusLvrnENSMUSG00000024481
rattus_norvegicusLvrnENSRNOG00000003950
drosophila_melanogasterCG7653FBGN0028935
drosophila_melanogasterCG9806FBGN0030222
drosophila_melanogasterCG2111FBGN0030223
drosophila_melanogasterCG6071FBGN0036186
drosophila_melanogasterCG5849FBGN0038897
drosophila_melanogastersuperdeathFBGN0039640
drosophila_melanogasterCG3502FBGN0046253
drosophila_melanogasterCG31233FBGN0051233
drosophila_melanogasterCG31343FBGN0051343
drosophila_melanogasterCG31445FBGN0051445
drosophila_melanogasterSP1029FBGN0263236
drosophila_melanogasterCG46339FBGN0285963
caenorhabditis_elegansF49B2.6WBGENE00009865
caenorhabditis_elegansWBGENE00011587
caenorhabditis_elegansWBGENE00012776
caenorhabditis_elegansWBGENE00013166

Paralogs (11): TRHDE (ENSG00000072657), LTA4H (ENSG00000111144), LNPEP (ENSG00000113441), ENPEP (ENSG00000138792), NPEPPS (ENSG00000141279), RNPEPL1 (ENSG00000142327), AOPEP (ENSG00000148120), ERAP1 (ENSG00000164307), ERAP2 (ENSG00000164308), ANPEP (ENSG00000166825), RNPEP (ENSG00000176393)

Protein

Protein identifiers

Aminopeptidase QQ6Q4G3 (reviewed: Q6Q4G3)

Alternative names: CHL2 antigen, Laeverin

All UniProt accessions (1): Q6Q4G3

UniProt curated annotations — full annotation on UniProt →

Function. Metalloprotease which may be important for placentation by regulating biological activity of key peptides at the embryo-maternal interface. On synthetic substrates it shows a marked preference for Leu-4-methylcoumaryl-7-amide (Leu-MCA) over Met-MCA, Arg-LCA and Lys-LCA. Cleaves the N-terminal amino acid of several peptides such as angiotensin-3, kisspeptin-10 and endokinin C.

Subunit / interactions. Homodimer.

Subcellular location. Membrane.

Tissue specificity. Specifically expressed in placenta and not in other tissues. Mainly found at the cell surface region of the extravillous trophoblasts. Detected on extravillous trophoblasts in the outer layer of the chorion laeve in the fetal membrane Not detected on either fetal amnionic epithelial cells or maternal decidual cells. Also detected in the migrating extravillous trophoblasts in the maternal decidual tissues (at protein level).

Post-translational modifications. N-glycosylated.

Activity regulation. Inhibited by bestatin.

Cofactor. Binds 1 zinc ion per subunit.

Miscellaneous. May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay. May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay.

Similarity. Belongs to the peptidase M1 family.

Isoforms (4)

UniProt IDNamesCanonical?
Q6Q4G3-11yes
Q6Q4G3-22
Q6Q4G3-33
Q6Q4G3-44

RefSeq proteins (1): NP_776161* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR001930Peptidase_M1Family
IPR014782Peptidase_M1_domDomain
IPR024571ERAP1-like_C_domDomain
IPR027268Peptidase_M4/M1_CTD_sfHomologous_superfamily
IPR034016M1_APN-typFamily
IPR042097Aminopeptidase_N-like_N_sfHomologous_superfamily
IPR045357Aminopeptidase_N-like_NDomain
IPR050344Peptidase_M1_aminopeptidasesFamily

Pfam: PF01433, PF11838, PF17900

UniProt features (35 total): glycosylation site 8, splice variant 7, binding site 5, sequence variant 3, sequence conflict 3, topological domain 2, active site 2, initiator methionine 1, chain 1, site 1, transmembrane region 1, region of interest 1

Structure

Experimental structures (PDB)

0 structures.

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q6Q4G3-F189.080.71

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Catalytic / active sites (3): 503 (transition state stabilizer); 416 (proton acceptor); 503 (proton donor)

Ligand- & substrate-binding residues (5): 415; 419; 438; 240; 379–383

Glycosylation sites (8): 132, 168, 261, 288, 319, 346, 607, 653

Function

Pathways and Gene Ontology

Reactome pathways

0 pathways

MSigDB gene sets: 66 (showing top): GOMF_METALLOPEPTIDASE_ACTIVITY, GCANCTGNY_MYOD_Q6, GOBP_PEPTIDE_METABOLIC_PROCESS, KOYAMA_SEMA3B_TARGETS_UP, GOBP_PEPTIDE_CATABOLIC_PROCESS, GOBP_PROTEOLYSIS, GOMF_METALLOEXOPEPTIDASE_ACTIVITY, GOMF_PEPTIDASE_ACTIVITY, GOMF_AMINOPEPTIDASE_ACTIVITY, GOMF_EXOPEPTIDASE_ACTIVITY, GOMF_METALLOAMINOPEPTIDASE_ACTIVITY, TAL1BETAITF2_01, SUPT16H_TARGET_GENES, ZFHX3_TARGET_GENES, MIR559

GO Biological Process (2): proteolysis (GO:0006508), peptide catabolic process (GO:0043171)

GO Molecular Function (8): zinc ion binding (GO:0008270), metalloaminopeptidase activity (GO:0070006), aminopeptidase activity (GO:0004177), protein binding (GO:0005515), peptidase activity (GO:0008233), metallopeptidase activity (GO:0008237), hydrolase activity (GO:0016787), metal ion binding (GO:0046872)

GO Cellular Component (2): obsolete extracellular space (GO:0005615), membrane (GO:0016020)

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
protein metabolic process1
peptide metabolic process1
catabolic process1
transition metal ion binding1
aminopeptidase activity1
metalloexopeptidase activity1
exopeptidase activity1
binding1
hydrolase activity1
catalytic activity, acting on a protein1
peptidase activity1
catalytic activity1
cation binding1
cellular anatomical structure1

Protein interactions and networks

STRING

1202 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
LVRNCHRDL2Q6WN34799
LVRNDNAI3Q8IWG1479
LVRNWBP2NLQ6ICG8477
LVRNEDN3P14138468
LVRNGALNTL5Q7Z4T8456
LVRNACSBG2Q5FVE4438
LVRNABCA13Q86UQ4418
LVRNNME8Q8N427410
LVRNCCDC149Q6ZUS6404
LVRNKIF14Q15058398
LVRNMAP4P27816397
LVRNZFHX3Q15911389
LVRNDRC11Q86XH1385
LVRNADGBQ8N7X0383
LVRNOR51I2Q9H344383
LVRNFANCLQ9NW38383

IntAct

2 interactions, top by confidence:

ABTypeScore
Mpsi-mi:“MI:0914”(association)0.350

BioGRID (3): AQPEP (Two-hybrid), AQPEP (Two-hybrid), AQPEP (Affinity Capture-MS)

ESM2 similar proteins: A0A6J2ATK2, A5HUI5, A6QPT7, D3UW23, M3XFH7, O57579, O88917, O88923, O94910, O95490, O97817, O97827, O97831, P15144, P15145, P15541, P15684, P16406, P42658, P42659, P46101, P50123, P79098, P79143, P79171, P97449, P97629, Q07075, Q10737, Q22523, Q2KHK3, Q2M2H8, Q32LQ0, Q5RFP3, Q6P179, Q6Q4G3, Q7Q2T8, Q7TT41, Q80TR1, Q80TS3

Diamond homologs: A0A6J2ATK2, A6NEC2, A6QPT7, M3XFH7, O57579, P15144, P15145, P15541, P15684, P46557, P50123, P79098, P79143, P79171, P97449, P97629, Q07075, Q10736, Q10836, Q2KHK3, Q32LQ0, Q5RFP3, Q6P179, Q6Q4G3, Q7Q2T8, Q8C129, Q8K093, Q95334, Q9EQH2, Q9JJ22, Q9UIQ6, Q9UKU6, A5HUI5, D3UW23, O93654, O93655, P0DQU2, P16406, P32454, P37893

SIGNOR signaling

0 interactions.

Disease & clinical

Clinical variants and AI predictions

ClinVar

147 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance126
Likely benign10
Benign3

Top pathogenic / likely-pathogenic (0)

SpliceAI

3941 predictions. Top by Δscore:

VariantEffectΔscore
5:115963314:T:Adonor_loss1.0000
5:115964712:G:GTdonor_gain1.0000
5:115964712:G:Tdonor_gain1.0000
5:115993736:A:AGacceptor_gain1.0000
5:115993737:A:Gacceptor_gain1.0000
5:115993737:AAAGT:Aacceptor_gain1.0000
5:115993738:AAGT:Aacceptor_gain1.0000
5:116000591:A:AGacceptor_gain1.0000
5:116000592:G:GGacceptor_gain1.0000
5:116000592:GT:Gacceptor_gain1.0000
5:116000592:GTC:Gacceptor_gain1.0000
5:116000592:GTCA:Gacceptor_gain1.0000
5:116000592:GTCAT:Gacceptor_gain1.0000
5:116002829:A:AGacceptor_gain1.0000
5:116002830:A:Gacceptor_gain1.0000
5:116002832:A:AGacceptor_gain1.0000
5:116002832:AAGT:Aacceptor_gain1.0000
5:116002833:A:Gacceptor_gain1.0000
5:116002834:G:GAacceptor_gain1.0000
5:116002834:GT:Gacceptor_gain1.0000
5:116002907:CAGCA:Cdonor_gain1.0000
5:116002908:AGCA:Adonor_gain1.0000
5:116002909:GCA:Gdonor_gain1.0000
5:116002909:GCAG:Gdonor_gain1.0000
5:116002910:CA:Cdonor_gain1.0000
5:116002912:G:GGdonor_gain1.0000
5:116003240:GAA:Gacceptor_gain1.0000
5:116012372:A:AGacceptor_gain1.0000
5:116012373:G:GGacceptor_gain1.0000
5:116012464:GCTCT:Gdonor_gain1.0000

AlphaMissense

6541 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
5:116001127:T:AW570R0.990
5:116001127:T:CW570R0.990
5:115983325:G:TR245M0.986
5:115984620:T:CF297L0.986
5:115984622:T:AF297L0.986
5:115984622:T:GF297L0.986
5:115999902:G:CK505N0.986
5:115999902:G:TK505N0.986
5:115983341:T:GC250W0.985
5:115993741:T:AW421R0.985
5:115993741:T:CW421R0.985
5:115993773:G:CW431C0.982
5:115993773:G:TW431C0.982
5:115993771:T:AW431R0.981
5:115993771:T:CW431R0.981
5:116010814:T:AW723R0.981
5:116010814:T:CW723R0.981
5:115993783:T:AW435R0.980
5:115993783:T:CW435R0.980
5:116000641:T:AW544R0.977
5:116000641:T:CW544R0.977
5:115963239:T:CF208L0.976
5:115963241:C:AF208L0.976
5:115963241:C:GF208L0.976
5:115983325:G:CR245T0.976
5:116015731:T:CF908L0.976
5:116015733:C:AF908L0.976
5:116015733:C:GF908L0.976
5:115987825:G:CA331P0.973
5:116015318:G:CW839C0.972

dbSNP variants (sampled 300 via entrez): RS1000076499 (5:116027023 T>A), RS1000108994 (5:115977602 T>C), RS1000157733 (5:115969840 A>T), RS1000174840 (5:115987212 A>G), RS1000262658 (5:116006679 A>G), RS1000391198 (5:115998109 T>C), RS1000433497 (5:115962733 A>G), RS1000548487 (5:115971288 G>T), RS1000595504 (5:116004070 A>G), RS1000665710 (5:116002902 C>G,T), RS1000721885 (5:116020720 T>G), RS1000722610 (5:115967461 T>C), RS1000723826 (5:115999099 C>A,T), RS1000781669 (5:115986159 G>C,T), RS1000792890 (5:116020940 A>G)

Disease associations

OMIM: gene MIM:610046 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

5 associations (top):

StudyTraitp-value
GCST002685_12Refractive astigmatism1.000000e-06
GCST002690_6Very long-chain saturated fatty acid levels (fatty acid 20:0)4.000000e-06
GCST008181_6Spontaneous preterm birth without premature rupture of membranes4.000000e-06
GCST90002390_138Mean corpuscular hemoglobin1.000000e-09
GCST90002404_211Red cell distribution width1.000000e-09

EFO canonical traits (4, from GWAS)

EFO IDTrait name
EFO:0006796very long-chain saturated fatty acid measurement
EFO:0006917spontaneous preterm birth
EFO:0004527mean corpuscular hemoglobin
EFO:0009188Red cell distribution width

Drugs & pharmacology

Drug and pharmacology data

Is drug target: yes

ChEMBL targets (1): CHEMBL3831223 (PROTEIN FAMILY)

PharmGKB: 1 entry (VIP=true, CPIC=false)

GtoPdb / IUPHAR curated pharmacology

(IUPHAR/BPS Guide to Pharmacology — expert-curated)

Target class: enzyme — M1: Aminopeptidase N

CTD chemical–gene interactions

7 total (human), top 7 by PubMed support.

ChemicalActions (top 5)PubMed papers
Nickeldecreases expression2
arseniteincreases methylation1
abrineincreases expression1
Arsenicaffects methylation1
Benzo(a)pyreneincreases methylation, affects methylation1
Naledaffects expression1
Cyclosporineincreases expression1

ChEMBL screening assays

1 unique, capped per target: 1 admet

Representative assays (with source publication via chembl_document):

Assay IDTypeDescriptionSource paper
CHEMBL4334276ADMETStability in pH 2 HCl assessed as aminopeptidase (unknown origin)-mediated compound hydrolysis by measuring parent compound remaining at 200 uM up to 6 hrs by RP-HPLC analysisAstratides: Insulin-Modulating, Insecticidal, and Antifungal Cysteine-Rich Peptides from Astragalus membranaceus. — J Nat Prod

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.

No linked Atlas pages yet — the cross-entity mesh grows as the corpus expands.