Tag Content
SG ID
SG00000478 
UniProt Accession
Theoretical PI
6.07  
Molecular Weight
132494 Da  
Genbank Nucleotide ID
Genbank Protein ID
Gene Name
LEPR 
Gene Synonyms/Alias
DB, OBR 
Protein Name
Leptin receptor 
Protein Synonyms/Alias
LEP-R HuB219; OB receptor;OB-R CD_antigen=CD295;Flags: Precursor 
Organism
Homo sapiens (Human) 
NCBI Taxonomy ID
9606 
Chromosome Location
chr:1;65886248-66107242;1
View in Ensembl genome browser  
Function in Stage
Function in Cell Type
Description
Leptin may have local effects on the function of testis and spermatogenesis. The dysfunction of spermatogenesis is associated with an increase in leptin and leptin receptor expression in the testis. 
The information of related literatures
1. B. Chen, J. H. Guo, Y. N. Lu, X. L. Ying, K. Hu, Z. Q. Xiang, Y. X. Wang, P. Chen and Y. R. Huang (2009) Leptin and varicocele-related spermatogenesis dysfunction. Int J Androl 32(5): 532-41. 

Abstract
The objective of this study was to explore the relationships between varicocele-related spermatogenesis dysfunction and the expression of leptin and leptin receptors. In rats with experimental varicocele, the function of spermatogenesis, the expression of leptin and leptin receptors in testes were analysed; and in patients with varicocele-related male infertility, serum and seminal plasma levels of leptin, gonadal hormones and semen parameters were evaluated. In the testes of rats, leptin was expressed in seminiferous tubules and intersitium, leptin receptor was predominantly expressed in interstitium. The expression of leptin and its receptor in the testis of rats was not related to the weight of rat, but was inversely related to the weight of testis (r = -0.408, p = 0.009 and r = -0.433, p = 0.005, respectively), the Johnsen scores (r = -0.916, p = 0.000 and r = -0.863, p = 0.000, respectively), the seminiferous tubules diameter (r = -0.853, p = 0.000 and r = -0.870, p = 0.000, respectively) and the thickness of seminiferous epithelium (r = -0.929, p = 0.000 and r = -0.948, p = 0.000, respectively). In varicocele patients (N = 40), the sperm concentration and motility were significantly lower (p = 0.000) than those in the control group (N = 25), and the leptin level in seminal plasma was significantly higher (p = 0.000) than that in the control group. The leptin in serum and seminal plasma was positively related (r = 0.223, p = 0.002). The seminal plasma leptin level was inversely related to sperm concentration (r = -0.632, p = 0.000) and motility (r = -0.635, p = 0.000). There was no significant relation between serum leptin and seminal parameters and between leptin and gonadal hormone values. The dysfunction of spermatogenesis in varicocele-related infertile male is associated with increase in leptin and leptin receptors. Leptin may have local effects on the function of testis and spermatogenesis. PMID: [18484972] 

2. T. Ishikawa, H. Fujioka, T. Ishimura, A. Takenaka and M. Fujisawa (2007) Expression of leptin and leptin receptor in the testis of fertile and infertile patients. Andrologia 39(1): 22-7. 

Abstract
The aim of our study was to investigate the relationships between the expression of leptin, leptin receptor in the testis and spermatogenesis, and testosterone (T) concentration in infertile men. Testicular tissue samples were collected from the testes of five fertile volunteers, eight patients with obstructive azoospermia (OA), six patients with Sertoli cell-only syndrome (SCO) and 32 oligospermic patients with varicocele testis. In testicular tissue, leptin and leptin receptor were identified by staining with polyclonal antibodies. Serum follicle stimulating hormone, lutenising hormone (LH), and T were determined by chemiluminescence assays. Leptin was expressed on germ cells, mainly on spermatocytes. The ratio of immunostained germ cells to total germ cells was inversely correlated with the concentration of T (r = -0.32, P = 0.01), sperm concentration (r = -0.51, P = 0.002) and Johnsen's score (r = -0.44,P = 0.005). In contrast, leptin receptor immunostained cells were found in the interstitium, primarily in Leydig cells. Leptin receptor expression on Leydig cells was inversely correlated with serum T concentration (r = -0.50, P < 0.001). The dysfunction of spermatogenesis is associated with an increase in leptin and leptin receptor expression in the testis. PMID: [17212806] 

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Figures for illustrating the function of this protein/gene
Ref: T. Ishikawa, H. Fujioka, T. Ishimura, A. Takenaka and M. Fujisawa (2007) Expression of leptin and leptin receptor in the testis of fertile and infertile patients. Andrologia 39(1): 22-7. PMID: [17212806]
Function
Receptor for obesity factor (leptin). On ligand binding,mediates signaling through JAK2/STAT3. Involved in the regulationof fat metabolism and, in a hematopoietic pathway, required fornormal lymphopoiesis. May play a role in reproduction. Can alsomediate the ERK/FOS signaling pathway (By similarity). 
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Subcellular Location
Isoform E: Secreted (Probable). 
Tissue Specificity
Isoform A is expressed in fetal liver and inhematopoietic tissues and choroid plexus. In adults highestexpression in heart, liver, small intestine, prostate and ovary.Low level in lung and kidney. Isoform B is highly expressed inhypothalamus. 
Gene Ontology
GO IDGO termEvidence
GO:0005576 C:extracellular region IEA:UniProtKB-SubCell.
GO:0016021 C:integral to membrane IEA:UniProtKB-KW.
GO:0005886 C:plasma membrane IEA:UniProtKB-SubCell.
GO:0004896 F:cytokine receptor activity IEA:InterPro.
GO:0004888 F:transmembrane signaling receptor activity TAS:ProtInc.
GO:0008203 P:cholesterol metabolic process IEA:Compara.
GO:0019221 P:cytokine-mediated signaling pathway IEA:GOC.
GO:0006112 P:energy reserve metabolic process TAS:ProtInc.
GO:0007275 P:multicellular organismal development TAS:ProtInc.
GO:0051346 P:negative regulation of hydrolase activity IEA:Compara.
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Interpro
IPR003961;    Fibronectin_type3.
IPR003529;    Hematopoietin_rcpt_Gp130_CS.
IPR003531;    Hempt_rcpt_S_F1_CS.
IPR007110;    Ig-like.
IPR013783;    Ig-like_fold.
IPR010457;    IgC2-like_lig-bd.
IPR015752;    Lep_receptor.
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Pfam
PF06328;    Lep_receptor_Ig;    1.
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SMART
SM00060;    FN3;    4.
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PROSITE
PS50853;    FN3;    4.
PS01353;    HEMATOPO_REC_L_F2;    1.
PS50835;    IG_LIKE;    1.
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PRINTS
Created Date
18-Oct-2012 
Record Type
Experiment identified 
Protein sequence Annotation
SIGNAL        1     21
CHAIN        22   1165       Leptin receptor.
                             /FTId=PRO_0000010904.
TOPO_DOM     22    839       Extracellular (Potential).
TRANSMEM    840    862       Helical; (Potential).
TOPO_DOM    863   1165       Cytoplasmic (Potential).
DOMAIN      237    330       Fibronectin type-III 1.
DOMAIN      331    429       Ig-like.
DOMAIN      537    631       Fibronectin type-III 2.
DOMAIN      639    732       Fibronectin type-III 3.
DOMAIN      734    829       Fibronectin type-III 4.
REGION      467    484       Leptin-binding (Probable).
REGION      893    898       Required for JAK2 activation (By
                             similarity).
MOTIF       622    626       WSXWS motif.
MOTIF       871    879       Box 1 motif.
MOD_RES     986    986       Phosphotyrosine; by JAK2 (By similarity).
MOD_RES    1141   1141       Phosphotyrosine; by JAK2 (By similarity).
CARBOHYD     23     23       N-linked (GlcNAc...).
CARBOHYD     41     41       N-linked (GlcNAc...).
CARBOHYD     56     56       N-linked (GlcNAc...).
CARBOHYD     73     73       N-linked (GlcNAc...).
CARBOHYD     81     81       N-linked (GlcNAc...).
CARBOHYD     98     98       N-linked (GlcNAc...).
CARBOHYD    187    187       N-linked (GlcNAc...).
CARBOHYD    206    206       N-linked (GlcNAc...).
CARBOHYD    276    276       N-linked (GlcNAc...).
CARBOHYD    347    347       N-linked (GlcNAc...).
CARBOHYD    397    397       N-linked (GlcNAc...).
CARBOHYD    516    516       N-linked (GlcNAc...).
CARBOHYD    624    624       N-linked (GlcNAc...).
CARBOHYD    659    659       N-linked (GlcNAc...).
CARBOHYD    688    688       N-linked (GlcNAc...).
CARBOHYD    697    697       N-linked (GlcNAc...).
CARBOHYD    728    728       N-linked (GlcNAc...).
CARBOHYD    750    750       N-linked (GlcNAc...).
DISULFID     37     90
DISULFID     89     99
DISULFID    131    142
DISULFID    186    196
DISULFID    188    193
DISULFID    352    412
DISULFID    413    418
DISULFID    436    447
DISULFID    473    528
DISULFID    488    498
VAR_SEQ     840   1165       Missing (in isoform E).
                             /FTId=VSP_001688.
VAR_SEQ     892    958       PETFEHLFIKHTASVTCGPLLLEPETISEDISVDTSWKNKD
                             EMMPTTVVSLLSTTDLEKGSVCISDQ -> MLEGSMFVKSH
                             HHSLISSTQGHKHCGRPQGPLHRKTRDLCSLVYLLTLPPLL
                             SYDPAKSPSVRNTQE (in isoform C).
                             /FTId=VSP_001691.
VAR_SEQ     892    906       PETFEHLFIKHTASV -> KMPGTKELLGGGWLT (in
                             isoform D).
                             /FTId=VSP_001693.
VAR_SEQ     892    896       PETFE -> RTDIL (in isoform A).
                             /FTId=VSP_001689.
VAR_SEQ     897   1165       Missing (in isoform A).
                             /FTId=VSP_001690.
VAR_SEQ     907   1165       Missing (in isoform D).
                             /FTId=VSP_001694.
VAR_SEQ     959   1165       Missing (in isoform C).
                             /FTId=VSP_001692.
VARIANT     109    109       K -> R (in dbSNP:rs1137100).
                             /FTId=VAR_002703.
VARIANT     124    124       D -> G (in dbSNP:rs35573508).
                             /FTId=VAR_049167.
VARIANT     204    204       K -> R.
                             /FTId=VAR_002704.
VARIANT     223    223       Q -> R (in dbSNP:rs1137101).
                             /FTId=VAR_002705.
VARIANT     503    503       I -> V (in dbSNP:rs13306526).
                             /FTId=VAR_028201.
VARIANT     656    656       K -> N (in dbSNP:rs8179183).
                             /FTId=VAR_002706.
VARIANT     675    675       S -> T.
                             /FTId=VAR_002707.
VARIANT     699    699       T -> M (in dbSNP:rs34499590).
                             /FTId=VAR_049168.
MUTAGEN     986    986       Y->F: Greatly reduced PTPN11 binding; no
                             PTPN11 phosphorylation; no effect on
                             STAT3 phosphorylation.
MUTAGEN    1078   1079       YY->FF: No effect on PTPN11 nor STAT3
                             phosphorylation.
MUTAGEN    1141   1141       Y->F: No effect on PTPN11
                             phosphorylation; no STAT3
                             phosphorylation.
CONFLICT     85     85       T -> A (in Ref. 3; AAC50509/AAC50510/
                             AAC50511).
CONFLICT    976    976       D -> A (in Ref. 1; AAA93015 and 4;
                             AAB09673).
STRAND      435    438
STRAND      445    449
STRAND      461    468
STRAND      484    486
STRAND      488    490
STRAND      496    500
STRAND      509    516
STRAND      527    529
HELIX       531    534
STRAND      544    548
TURN        549    552
STRAND      553    557
STRAND      568    580
STRAND      584    588
STRAND      595    598
STRAND      607    615
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Nucleotide Sequence
Length: 3800 bp   Go to nucleotide: FASTA
Protein Sequence
Length: 1165 bp   Go to amino acid: FASTA
The verified Protein-Protein interaction information
UniProt
Gene Symbol Ref Databases
SNX1BioGRID 
ADIPOQString 
ADIPOR1String 
ADIPOR2String 
_HPRD 
SNX6BioGRID 
CDIPTString 
CLUHPRD 
GRB2IntAct 
LEPHPRD 
ADIPOQString 
ADIPOR1String 
ADIPOR2String 
APODHPRD 
CDIPTString 
GRB2DIP 
JAK2HPRD 
JAK3BioGRID 
LEPRHPRD 
LEPRHPRD 
LEPHPRD 
PIN1HPRD 
PTPN11HPRD 
PTPRCDIP 
STAT3HPRD 
LEPROTDIP 
PIN1IntAct 
PTPRCIntAct 
PTPRJIntAct 
SOCS3HPRD 
_HPRD 
SNX1HPRD 
SNX2HPRD 
SNX4HPRD 
SNX6HPRD 
SOCS3HPRD 
Other Protein-Protein interaction resources
String database  
View Microarray data
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