LDB2

gene
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Also known as CLIM1LDB1

Summary

LDB2 (LIM domain binding 2, HGNC:6533) is a protein-coding gene on chromosome 4p15.32, encoding LIM domain-binding protein 2 (O43679). Transcription cofactor. It is a selective cancer dependency (DepMap: 14.7% of cell lines).

The protein encoded by this gene belongs to the LIM-domain binding family. Members of this family are characterized by a conserved nuclear localization sequence, an amino-terminal homodimerization domain and a carboxy-terminal LIM interaction domain. These proteins function as adapter molecules to allow assembly of transcriptional regulatory complexes. Genetic association studies suggest functions for this gene in rhegmatogenous retinal detachment and coronary artery disease. Alternative splicing results in multiple transcript variants.

Source: NCBI Gene 9079 — RefSeq curated summary.

At a glance

  • GWAS associations: 9
  • Clinical variants (ClinVar): 40 total
  • Cancer dependency (DepMap): dependent in 14.7% of screened cell lines
  • MANE Select transcript: NM_001290

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:6533
Approved symbolLDB2
NameLIM domain binding 2
Location4p15.32
Locus typegene with protein product
StatusApproved
AliasesCLIM1, LDB1
Ensembl geneENSG00000169744
Ensembl biotypeprotein_coding
OMIM603450
Entrez9079

Gene structure

Transcript identifiers

Ensembl transcripts: 20 — 10 protein_coding, 6 protein_coding_CDS_not_defined, 2 retained_intron, 2 nonsense_mediated_decay

ENST00000304523, ENST00000441778, ENST00000502640, ENST00000503153, ENST00000503829, ENST00000504189, ENST00000504886, ENST00000506732, ENST00000507464, ENST00000508804, ENST00000508918, ENST00000509803, ENST00000510825, ENST00000512345, ENST00000513457, ENST00000515064, ENST00000854229, ENST00000854230, ENST00000854231, ENST00000854232

RefSeq mRNA: 4 — MANE Select: NM_001290 NM_001130834, NM_001290, NM_001304434, NM_001304435

CCDS: CCDS3420, CCDS47031, CCDS77902, CCDS77903

Canonical transcript exons

ENST00000304523 — 8 exons

ExonStartEnd
ENSE000020647281689835416898645
ENSE000035117941675915816759260
ENSE000035684011650853516508686
ENSE000035774021658592216586005
ENSE000035948031651198116512104
ENSE000036273051659570316595875
ENSE000036375351658871016588832
ENSE000036689081650154116502873

Expression profiles

Bgee: expression breadth ubiquitous, 270 present calls, max score 98.56.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 25.1095 / max 596.7868, expressed in 1035 samples.

FANTOM5 promoters (10 alternative TSS)

Promoter IDTPM avgSamples expressed
5151818.9621978
515161.5776582
515200.9354524
515150.7666383
515170.7487379
515210.7426457
515140.6484269
515190.3585216
515220.3214138
515050.048223

Top tissues by expression

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

TissueAnatomy IDExpression scoreQuality
right lungUBERON:000216798.56gold quality
cortical plateUBERON:000534397.91gold quality
Brodmann (1909) area 23UBERON:001355497.82gold quality
middle temporal gyrusUBERON:000277197.14gold quality
body of uterusUBERON:000985396.77gold quality
superior frontal gyrusUBERON:000266196.71gold quality
vena cavaUBERON:000408796.52gold quality
Brodmann (1909) area 10UBERON:001354196.39gold quality
primary visual cortexUBERON:000243696.13gold quality
frontal poleUBERON:000279596.00gold quality
omental fat padUBERON:001041495.68gold quality
adipose tissue of abdominal regionUBERON:000780895.67gold quality
peritoneumUBERON:000235895.66gold quality
calcaneal tendonUBERON:000370195.62gold quality
prefrontal cortexUBERON:000045195.58gold quality
upper lobe of left lungUBERON:000895295.53gold quality
pericardiumUBERON:000240795.47gold quality
occipital lobeUBERON:000202195.44gold quality
stromal cell of endometriumCL:000225595.43gold quality
endocervixUBERON:000045895.42gold quality
dorsolateral prefrontal cortexUBERON:000983495.41gold quality
upper lobe of lungUBERON:000894895.39gold quality
postcentral gyrusUBERON:000258195.32gold quality
lungUBERON:000204895.17gold quality
adipose tissueUBERON:000101395.12gold quality
parietal lobeUBERON:000187295.09gold quality
subcutaneous adipose tissueUBERON:000219094.97gold quality
Brodmann (1909) area 9UBERON:001354094.85gold quality
Brodmann (1909) area 46UBERON:000648394.71gold quality
orbitofrontal cortexUBERON:000416794.67gold quality

Single-cell (SCXA)

Detected in 25 experiment(s), a significant marker in 23.

ExperimentMarker?Max mean expression
E-ANND-2yes6940.63
E-GEOD-131882yes6484.08
E-CURD-119yes5060.89
E-MTAB-11268yes4798.60
E-HCAD-35yes1296.30
E-HCAD-25yes951.44
E-CURD-112yes745.42
E-GEOD-109979yes163.23
E-CURD-53yes114.24
E-MTAB-10287yes75.93
E-HCAD-10yes58.48
E-MTAB-10553yes54.57
E-HCAD-1yes47.24
E-GEOD-134144yes43.97
E-GEOD-135922yes37.13

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

67 targeting LDB2, 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-6833-3P100.0070.633197
HSA-MIR-4768-5P100.0069.492861
HSA-MIR-340-5P100.0072.504437
HSA-MIR-8485100.0077.574731
HSA-MIR-1213699.9872.815713
HSA-MIR-480399.9871.993117
HSA-MIR-485-3P99.9870.681585
HSA-MIR-539-3P99.9870.741616
HSA-MIR-3688-3P99.9772.022834
HSA-MIR-314899.9775.066478
HSA-MIR-548AA99.9670.643753
HSA-MIR-548AP-3P99.9670.643753
HSA-MIR-548T-3P99.9670.643753
HSA-MIR-570-3P99.9672.414910
HSA-MIR-96-5P99.9572.802140
HSA-MIR-6845-3P99.9466.881439
HSA-MIR-338-5P99.9272.342951
HSA-MIR-1213399.9271.822006
HSA-MIR-6809-3P99.9171.453814
HSA-MIR-1271-5P99.9171.991972
HSA-MIR-627-3P99.9071.423316
HSA-MIR-449399.9066.48977
HSA-MIR-806299.8868.43995
HSA-MIR-612499.8769.783551
HSA-MIR-576-5P99.8470.462582
HSA-MIR-3121-3P99.8271.963630
HSA-MIR-313399.8170.923506
HSA-MIR-442299.7272.072908
HSA-MIR-120099.7170.421838
HSA-MIR-545-5P99.6670.182308

Functional genomics

DepMap (CRISPR cell-line fitness): dependent in 14.7% of screened cell lines.

Literature-anchored findings (GeneRIF, showing 6)

  • The transcription co-factor LIM domain binding 2 (LDB2) was identified as a potential high-hierarchy regulator of the atherosclerosis-module. (PMID:19997623)
  • LDB2 was the most connected gene in a transcription factor regulatory network inferred from transendothelial migration of leukocyte and atherosclerosis module genes in coronary and carotid artery disease macrophages. (PMID:24925974)
  • The regulation of DLL4 by the LDB2 complex provides a novel mechanism of DLL4 transcriptional control that may be exploited to develop therapeutics for aberrant vascular remodeling. (PMID:28946938)
  • Cooperation of LIM domain-binding 2 (LDB2) with EGR in the pathogenesis of schizophrenia. (PMID:33656268)
  • [LIM-domain binding protein 2 regulated by m(6)A modification inhibits lung adenocarcinoma cell proliferation in vitro]. (PMID:33849822)
  • LIM-domain binding protein 2 was down-regulated by miRNA-96-5p inhibited the proliferation, invasion and metastasis of lung cancer H1299 cells. (PMID:36473369)

Cross-species orthologs

6 orthologs

OrganismSymbolGene ID
danio_rerioldb2aENSDARG00000019579
danio_rerioldb2bENSDARG00000034896
mus_musculusLdb2ENSMUSG00000039706
rattus_norvegicusLdb2ENSRNOG00000003205
drosophila_melanogasterChiFBGN0013764
caenorhabditis_elegansWBGENE00002261

Paralogs (1): LDB1 (ENSG00000198728)

Protein

Protein identifiers

LIM domain-binding protein 2O43679 (reviewed: O43679)

Alternative names: Carboxyl-terminal LIM domain-binding protein 1, LIM domain-binding factor CLIM1

All UniProt accessions (7): D6RAT1, E7EX95, E9PFI4, E9PGU0, O43679, G5E9Y7, H0YA09

UniProt curated annotations — full annotation on UniProt →

Function. Transcription cofactor. Binds to the LIM domain of a wide variety of LIM domain-containing transcription factors.

Subunit / interactions. Interacts with LHX9. Interacts with SLK; leading to negatively regulate SLK kinase activity. Interacts with LMO4.

Subcellular location. Nucleus.

Post-translational modifications. Ubiquitinated by RLIM/RNF12, leading to its degradation by the proteasome.

Miscellaneous. Lacks LIM-binding domain.

Similarity. Belongs to the LDB family.

Isoforms (3)

UniProt IDNamesCanonical?
O43679-11, a, CLIM1ayes
O43679-22, b, CLIM1b
O43679-33

RefSeq proteins (4): NP_001124306, NP_001281, NP_001291363, NP_001291364 (=MANE)

Domains & families (InterPro)

IDNameType
IPR029005LIM-bd/SEUSSFamily
IPR041363LIDDomain

Pfam: PF01803, PF17916

UniProt features (10 total): splice variant 4, region of interest 2, compositionally biased region 2, chain 1, domain 1

Structure

Experimental structures (PDB)

0 structures.

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-O43679-F173.800.43

Function

Pathways and Gene Ontology

Reactome pathways

0 pathways

MSigDB gene sets: 539 (showing top): GOBP_MYELOID_CELL_DIFFERENTIATION, GOBP_HEMOGLOBIN_METABOLIC_PROCESS, GOBP_CHROMOSOME_ORGANIZATION, GOBP_HINDBRAIN_DEVELOPMENT, GOBP_EPITHELIUM_DEVELOPMENT, GOBP_SOMATIC_STEM_CELL_POPULATION_MAINTENANCE, GOBP_METENCEPHALON_DEVELOPMENT, GOBP_AXIS_SPECIFICATION, GOBP_MYELOID_CELL_HOMEOSTASIS, RODRIGUES_THYROID_CARCINOMA_POORLY_DIFFERENTIATED_UP, CCAWYNNGAAR_UNKNOWN, GOBP_REGULATION_OF_PHOSPHORYLATION, RORA1_01, GCANCTGNY_MYOD_Q6, GOBP_FOCAL_ADHESION_ASSEMBLY

GO Biological Process (9): negative regulation of transcription by RNA polymerase II (GO:0000122), hair follicle development (GO:0001942), nervous system development (GO:0007399), epithelial structure maintenance (GO:0010669), regulation of cell migration (GO:0030334), somatic stem cell population maintenance (GO:0035019), regulation of kinase activity (GO:0043549), positive regulation of cellular component biogenesis (GO:0044089), positive regulation of transcription by RNA polymerase II (GO:0045944)

GO Molecular Function (4): transcription coregulator activity (GO:0003712), enzyme binding (GO:0019899), LIM domain binding (GO:0030274), protein binding (GO:0005515)

GO Cellular Component (6): nucleus (GO:0005634), nucleoplasm (GO:0005654), transcription regulator complex (GO:0005667), nucleolus (GO:0005730), plasma membrane (GO:0005886), cell leading edge (GO:0031252)

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
regulation of transcription by RNA polymerase II2
transcription by RNA polymerase II2
nuclear lumen2
cellular anatomical structure2
negative regulation of DNA-templated transcription1
hair cycle process1
anatomical structure development1
skin epidermis development1
system development1
tissue homeostasis1
cell migration1
regulation of cell motility1
stem cell population maintenance1
kinase activity1
regulation of phosphorylation1
regulation of transferase activity1
cellular component biogenesis1
regulation of cellular component biogenesis1
positive regulation of cellular process1
positive regulation of DNA-templated transcription1
transcription regulator activity1
protein binding1
protein domain specific binding1
binding1
intracellular membrane-bounded organelle1
protein-containing complex1
intracellular membraneless organelle1
membrane1
cell periphery1

Protein interactions and networks

STRING

1576 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
LDB2LMO2P25791998
LDB2TAL1P17542995
LDB2GATA1P15976995
LDB2TCF3P15883992
LDB2GATA2P23769982
LDB2CBFA2T3O75081981
LDB2LYL1P12980965
LDB2ISL1P20663944
LDB2LMO1P25800922
LDB2LHX2P50458907
LDB2LHX3Q9UBR4907
LDB2ZFPM1Q8IX07900
LDB2RUNX1Q01196882
LDB2BEX2Q9BXY8875
LDB2BEX1Q9HBH7875

IntAct

93 interactions, top by confidence:

ABTypeScore
LDB2LMO4psi-mi:“MI:0915”(physical association)0.800
LMO4LDB2psi-mi:“MI:0915”(physical association)0.800
LDB2TSNAXpsi-mi:“MI:0915”(physical association)0.670
MYDGFLDB2psi-mi:“MI:0915”(physical association)0.560
LDB2MYDGFpsi-mi:“MI:0915”(physical association)0.560
LDB2LNX1psi-mi:“MI:0915”(physical association)0.560
LDB2LHX8psi-mi:“MI:0915”(physical association)0.560
LDB2LMO3psi-mi:“MI:0915”(physical association)0.560
LDB2GGACTpsi-mi:“MI:0915”(physical association)0.560
LDB2DGCR6Lpsi-mi:“MI:0915”(physical association)0.560
LDB2TTC19psi-mi:“MI:0915”(physical association)0.560
LDB2NTAQ1psi-mi:“MI:0915”(physical association)0.560
LDB2LMO1psi-mi:“MI:0915”(physical association)0.560
LDB2PSMB1psi-mi:“MI:0915”(physical association)0.560
SDCBPLDB2psi-mi:“MI:0915”(physical association)0.560
LDB2C14orf119psi-mi:“MI:0915”(physical association)0.560
LDB2EGLN3psi-mi:“MI:0915”(physical association)0.560
LDB2HDAC7psi-mi:“MI:0915”(physical association)0.560
LDB2EPM2AIP1psi-mi:“MI:0915”(physical association)0.560
LDB2EXOC3L1psi-mi:“MI:0915”(physical association)0.560
CETN3LDB2psi-mi:“MI:0915”(physical association)0.560
LDB2SMARCD1psi-mi:“MI:0915”(physical association)0.560
LDB2LMO2psi-mi:“MI:0915”(physical association)0.560
LDB2LMO3psi-mi:“MI:0915”(physical association)0.550
LDB2SSBP3psi-mi:“MI:0915”(physical association)0.550

BioGRID (37): LHX4 (Two-hybrid), LMO3 (Two-hybrid), LMO4 (Two-hybrid), RASIP1 (Two-hybrid), RILP (Two-hybrid), SSBP2 (Two-hybrid), SSBP3 (Two-hybrid), TSNAX (Two-hybrid), LDB2 (Affinity Capture-MS), LDB2 (Two-hybrid), LDB2 (Two-hybrid), LDB2 (Two-hybrid), LDB2 (Two-hybrid), LDB2 (Two-hybrid), LDB2 (Two-hybrid)

ESM2 similar proteins: A1C602, A1DG01, A1DMG9, A2QFG8, A2VDM8, A5DF43, A6SP81, A7EAG1, B0XVV1, B1AWL2, B6HSQ3, B6Q3B6, B8LT44, B8N6M6, C4JFE4, C4R1K8, C5FP02, C5PHH6, C7YM38, D4AL61, D4D2Y6, E4UP58, E5DG73, O42252, O43679, O55203, P28348, P28349, P52959, P70060, Q03297, Q05534, Q0CHR0, Q13233, Q1EQW7, Q2UD93, Q2UMM2, Q2YDF2, Q4WHB7, Q4WHD1

Diamond homologs: G5EEL0, O42252, O43679, O55203, O73715, P70060, P70662, Q1EQW7, Q6NVL6, Q86U70, Q9W676

SIGNOR signaling

1 interactions.

AEffectBMechanism
RLIM“down-regulates quantity by destabilization”LDB2polyubiquitination

Disease & clinical

Clinical variants and AI predictions

ClinVar

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

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance30
Likely benign4
Benign1

Top pathogenic / likely-pathogenic (0)

SpliceAI

4405 predictions. Top by Δscore:

VariantEffectΔscore
4:16508533:A:ACdonor_gain1.0000
4:16508534:C:CCdonor_gain1.0000
4:16508682:TTCTG:Tacceptor_gain1.0000
4:16508683:TCTG:Tacceptor_loss1.0000
4:16508684:CTG:Cacceptor_gain1.0000
4:16508685:TG:Tacceptor_gain1.0000
4:16508686:GC:Gacceptor_loss1.0000
4:16508687:C:CCacceptor_gain1.0000
4:16508687:C:CGacceptor_loss1.0000
4:16508688:T:Aacceptor_loss1.0000
4:16508691:A:Tacceptor_gain1.0000
4:16508692:A:ACacceptor_gain1.0000
4:16508694:A:Cacceptor_gain1.0000
4:16512100:CACAA:Cacceptor_gain1.0000
4:16512102:CAA:Cacceptor_gain1.0000
4:16512105:C:CCacceptor_gain1.0000
4:16585920:AC:Adonor_gain1.0000
4:16585921:CC:Cdonor_gain1.0000
4:16588704:A:ACdonor_gain1.0000
4:16588705:C:CCdonor_gain1.0000
4:16588706:TTA:Tdonor_loss1.0000
4:16588707:TAC:Tdonor_loss1.0000
4:16588708:A:ACdonor_gain1.0000
4:16588708:A:ATdonor_loss1.0000
4:16588708:ACATG:Adonor_gain1.0000
4:16588709:C:CGdonor_gain1.0000
4:16588709:CA:Cdonor_gain1.0000
4:16588709:CAT:Cdonor_gain1.0000
4:16588709:CATG:Cdonor_gain1.0000
4:16588709:CATGC:Cdonor_gain1.0000

AlphaMissense

2487 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
4:16502790:G:CN325K1.000
4:16502790:G:TN325K1.000
4:16502797:A:GL323S1.000
4:16502799:T:AR322S1.000
4:16502799:T:GR322S1.000
4:16502800:C:GR322T1.000
4:16502806:A:CI320S1.000
4:16502806:A:GI320T1.000
4:16502806:A:TI320N1.000
4:16502811:C:AR318S1.000
4:16502811:C:GR318S1.000
4:16502812:C:AR318M1.000
4:16502851:G:TP305Q1.000
4:16502852:G:AP305S1.000
4:16502852:G:TP305T1.000
4:16512003:C:AW239C1.000
4:16512003:C:GW239C1.000
4:16512005:A:GW239R1.000
4:16512005:A:TW239R1.000
4:16512012:A:CF236L1.000
4:16512012:A:TF236L1.000
4:16512013:A:CF236C1.000
4:16512013:A:GF236S1.000
4:16512014:A:GF236L1.000
4:16512016:A:CL235W1.000
4:16512028:A:GL231P1.000
4:16512028:A:TL231Q1.000
4:16512030:G:CC230W1.000
4:16512031:C:TC230Y1.000
4:16512032:A:GC230R1.000

dbSNP variants (sampled 300 via entrez): RS1000005978 (4:16775610 A>G), RS1000025497 (4:16622522 A>G), RS1000031377 (4:16883963 T>A,C), RS1000031502 (4:16858330 A>G), RS1000032669 (4:16581158 T>G), RS1000052430 (4:16760431 G>T), RS1000055580 (4:16571499 A>G), RS1000056785 (4:16851351 C>G,T), RS1000074383 (4:16662870 T>C), RS10000826 (4:16887027 C>A,T), RS1000084451 (4:16686988 T>G), RS1000096559 (4:16647149 A>G), RS1000097965 (4:16885404 G>A), RS1000106674 (4:16858579 C>T), RS1000107207 (4:16817283 C>T)

Disease associations

OMIM: gene MIM:603450 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

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

GWAS associations

9 associations (top):

StudyTraitp-value
GCST001922_7QT interval7.000000e-06
GCST001966_4Rhegmatogenous retinal detachment5.000000e-06
GCST004025_22Systemic juvenile idiopathic arthritis4.000000e-06
GCST004790_1Change in LVEF in response to paclitaxel and trastuzumab in HER2+ breast cancer9.000000e-08
GCST007326_2Number of sexual partners1.000000e-08
GCST008151_45Waist circumference5.000000e-06
GCST008160_40Waist circumference5.000000e-06
GCST010678_2Liver fibrosis (total hepatic collagen content)2.000000e-06
GCST011998_16Glucocorticoid receptor gene expression in B-cell precursor acute lymphoblastic leukaemia1.000000e-05

EFO canonical traits (4, from GWAS)

EFO IDTrait name
EFO:0004682QT interval
EFO:0008204left ventricular diastolic function measurement
EFO:0008347response to trastuzumab
EFO:0010576liver fibrosis measurement

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

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

CTD chemical–gene interactions

35 total (human), top 30 by PubMed support.

ChemicalActions (top 5)PubMed papers
Valproic Acidincreases expression, affects expression, decreases expression, affects cotreatment6
bisphenol Aaffects cotreatment, increases methylation, increases expression3
trichostatin Aaffects cotreatment, increases expression3
Benzo(a)pyreneaffects methylation, decreases expression, decreases methylation3
Vorinostatincreases expression, affects cotreatment2
Phenylmercuric Acetateaffects cotreatment, decreases expression2
Aflatoxin B1affects expression, decreases methylation2
Cadmium Chloridedecreases expression, increases abundance, increases expression2
methylmercuric chloridedecreases expression1
methyleugenoldecreases expression1
aflatoxin B2increases methylation1
CGP 52608affects binding, increases reaction1
4-(5-benzo(1,3)dioxol-5-yl-4-pyridin-2-yl-1H-imidazol-2-yl)benzamideaffects cotreatment, decreases expression, increases expression1
dorsomorphinaffects cotreatment, decreases expression, increases expression1
theaflavin-3,3’-digallateaffects expression1
Zoledronic Acidincreases expression1
Arsenic Trioxidedecreases expression1
Fulvestrantaffects cotreatment, increases methylation1
Acetaminophendecreases expression1
Cadmiumdecreases expression, increases abundance1
Cocainedecreases expression1
Dexamethasoneincreases expression, affects cotreatment1
Doxorubicindecreases expression1
Indomethacinaffects cotreatment, increases expression1
Nickeldecreases expression1
Phthalic Acidsincreases methylation1
Triclosanincreases expression1
Vanadatesincreases expression1
Vitamin Eincreases expression1
1-Methyl-3-isobutylxanthineaffects cotreatment, increases expression1

Clinical trials (associated diseases)

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