Symbol Title/Gene OMIM Locus Size (Kb) Other related diseases
ADHD1 Attention deficit-hyperactivity disorder, susceptibility to, 1 608903 16p13    
ADHD2 Attention deficit-hyperactivity disorder, susceptibility to, 2 608904 17p11    
ADHD3 Attention deficit-hyperactivity disorder, susceptibility to, 3 608905 6q12    
ADHD4 Attention deficit-hyperactivity disorder, susceptibility to, 4 608906 5p13    
ADHD5 Attention deficit-hyperactivity disorder, susceptibility to, 5 612311 2q21.1    
ADHD6 Attention deficit-hyperactivity disorder, susceptibility to, 6 612312 13q12.11    
ADORA2A Adenosine A2a receptor 102776 22q11.23 14.80 kb  
ADRA1A Adrenergic, alpha-1A-, receptor 104221 8p21.2 117.26 kb  
ADRA2A Adrenergic, alpha-2A-, receptor 104210 10q25.2 3.65 kb • Susceptibility to type 2 diabetes
ADRA2C Adrenergic, alpha-2C-, receptor 104250 4p16 1.00 kb • Susceptibility to congestive heart failure
ADRB2 Adrenoceptor beta 2, surface 109690 5q31-q32 2.04 kb • Susceptibility to asthma, nocturnal
• Susceptibility to obesity
ANK3 Ankyrin 3, node of Ranvier (ankyrin G) 600465 10q21.2 707.23 kb • Mental retardation, autosomal recessive, 37
APOE Apolipoprotein E 107741 19q13.32 3.61 kb • Alzheimer disease
• Familial dysbetalipoproteinemia, hyperlipoproteinemia type III
• Age related macular dystrophy, 2
• Sea-blue histiocyte disease
AS3MT Arsenic (+3 oxidation state) methyltransferase 611806 10q24.32 32.45 kb • Susceptibility to arsenic-dependent carcinogenesis
ASTN1 Astrotactin 1 600904 1q25.2 303.00 kb  
ASTN2 Astrotactin 2 612856 9q33.1 990.00 kb • Susceptibility to schizophrenia
BAIAP2 BAI1-associated protein 2 605475 17q25.3 82.29 kb  
BCHE Butyrylcholinesterase 177400 3q26.1 64.56 kb • Apnea, postanesthetic, suxamethonium sensitivity
BDNF   Brain-derived neurotrophic factor 113505 11p14.1 67.16 kb • WAGR complex
• Central hypoventilation syndrome (congenital)
• Susceptibility to anorexia nervosa and bulimia nervosa.
• Susceptibility to memory impairment.
CADM2 Cell adhesion molecule 2 609938 3p12.1 342.00 kb  
CAMTA1 Calmodulin binding transcription activator 1 611501 1p36.31 984.38 kb • Cerebellar ataxia, nonprogressive, with mental retardation
CES1 Carboxylesterase 1 (monocyte/macrophage serine esterase 1) 114835 16q12.2 30.31 kb • Carboxylesterase 1 deficiency
• Susceptibility to alteration of pharmacokinetics and drug response
CDH13 Cadherin 13, H-cadherin 601364 16q23.3 1169.62 kb  
CHRNA4 Cholinergic receptor, nicotinic, alpha polypeptide 4 118504 20q13.33 18.09 kb • Epilepsy, nocturnal frontal lobe, type 1
• Susceptibility to nicotine addiction
CHRNA7 Cholinergic receptor, nicotinic, alpha 7 (neuronal) 118511 15q13.3 139.70 kb • Chromosome 15q13.3 microdeletion
CLOCK Clock circadian regulator 601851 4q12   • Susceptibility to obesity
• Susceptibility to metabolic syndrome
• Susceptibility to behavioral disorders
COMT Catechol-O-methyltransferase 116790 22q11.21 28.24 kb • Susceptibility to schizophrenia
• Susceptibility to panic disorder
CYFIP1 Cytoplasmic FMR1 interacting protein 1 606322 15q11.2 110.92 kb • Angelman syndrome
DAB2 Disabled homolog 2, mitogen-responsive phosphoprotein (Drosophila) 601236 5p13.1 53.56 kb  
DBH Dopamine beta-hydroxylase (dopamine beta-monooxygenase) 609312 9q34 22.98 kb • Dopamine beta-hydroxylase deficiency
DDC Dopa decarboxylase (aromatic L-amino acid decarboxylase) 107930 7p12.1 107.02 kb • Aromatic L-amino acid decarboxylase deficiency
DISC1 Disrupted in schizophrenia 1 605210 1q42.2 414.46 kb • Susceptibility to schizophrenia
• Susceptibility to schizoaffective disorder
DRD1 Dopamine receptor D1 126449 5q35.2 3.49 kb  
DRD2 Dopamine receptor d2 126450 11q23.2 65.68 kb • Dystonia myoclonic
DRD4 Dopamine receptor d4 126452 11p15.5 3.40 kb • Autonomic nervous system dysfunction
• Novelty seeking personality
DRD5 Dopamine receptor d5 126453 4p16.1 2.38 kb • Primary cervical dystonia
• Blepharospasm, primary benign
ELK3 ELK3, ETS-domain protein (SRF accessory protein 2) 600247 12q23 72.00 kb  
FADS2 Fatty acid desaturase 2 606149 11q12.2 39.00 kb  
FBXO33 F-box only protein 33 609103 14q21.1 34.00 kb • Susceptibility to osteoporosis
FMR1 Fragile X mental retardation 1 309550 Xq27.3 39.18 kb • Fragile X syndrome
• Premature ovarian failure, fragile X-associated
• Fragile-X tremor ataxia syndrome
FTO Fat mass and obesity associated 610966 16q12.2 410.50 kb • Growth retardation, psychomotor delay, early death
• Severe obesity
GDNF Glial cell derived neurotrophic factor 600837 5p13.2 24.03 kb • Central hypoventilation syndrome
• Susceptibility to Hirschsprung disease
GNPDA2 Glucosamine-6-phosphate deaminase 2 613222 4p12 24.45 kb • Susceptibility to obesity
GPRC5B G protein-coupled receptor, family C, group 5, member B 605948 16p12.3 27.08 kb  
GPR139 G protein-coupled receptor 139   16p13.11 41.00 kb  
GRM5 Glutamate receptor, metabotropic 5 604102 11q14.3 559.07 kb  
GRM7 Glutamate receptor, metabotropic 7 604101 3p26.1-p25.1 880.29 kb • Susceptibility to age-related hearing impairment
GUCY2C Guanylate cyclase 2C (heat stable enterotoxin receptor) 601330 12p12.3 83.95 kb • Diarrhea
• Meconium ileus
HTR1A 5-hydroxytryptamine (serotonin) receptor 1A 109760 5q11.2-q13 1.00 kb • Periodic fever, menstrual cycle dependent
HTR1B 5-hydroxytryptamine (serotonin) receptor 1B 182131 6q13 1.00 kb  
HTR1E 5-hydroxytryptamine (serotonin) receptor 1E 182132 6q14-q15 78.00 kb  
HTR2A 5-hydroxytryptamine (serotonin) receptor 2A 182135 13q14.2 63.48 kb • Susceptibility to alcohol dependence
• Susceptibility to anorexia nervosa
• Susceptibility to obsessive-compulsive disorder
• Susceptibility to schizophrenia
• Susceptibility to seasonal affective disorder
HTR2C 5-hydroxytryptamine (serotonin) receptor 2C, G protein-coupled 312861 Xq24 358.68 kb • Susceptibility to obesity
• Susceptibility to behavioral disorders
ITIH3 Inter-alpha (globulin) inhibitor H3 146650 3p21.1 14.24 kb  
KALRN Kalirin, RhoGEF kinase 604605 3q21.2 626.48 kb • Susceptibility to coronary heart disease
KCNJ5 Potassium inwardly-rectifying channel, subfamily J, member 5 600734 11q24.3 26.65 kb • Hyperaldosteronism, familial, type III
• Long QT syndrome 13
KLF13 Kruppel-like factor 13 605328 15q13.3 51.02 kb  
LPHN3 Latrophilin 3   4q13.1 575.00 kb  
MAOA Monoamine oxidase A 309850 Xp11.3 90.00 kb • Brunner sĂ­ndrome
• MAOA/B deletion  syndrome
• Susceptibility to antisocial behavior
MAP2K5 Mitogen-activated protein kinase kinase 5 602520 15q23 264.43 kb  
MTHFR Methylenetetrahydrofolate reductase (NAD(P)H) 607093 1p36.22 20.33 kb • Homocystinuria due to MTHFR deficiency
• Susceptibility to vascular disease
• Susceptibility to thromboembolism
• Susceptibility to schizophrenia
• Susceptibility to neural tube defects
MTMR10 Myotubularin related protein 10   15q13.3 46.00 kb  
NCAM1 Neural cell adhesion molecule 1 116930 11q23.2 317.19 kb • Susceptibility to neural tube defects
• Susceptibility to alcohol dependence
• Susceptibility to left ventricular wall thickness and relative wall thickness in hypertensive families
NGF Nerve growth factor (beta polypeptide) 162030 1p13.1 52.32 kb • Neuropathy, hereditary sensory and autonomic, type V
NGF Nerve growth factor (beta polypeptide) 162030 1p13.1 52.32 kb • Neuropathy, hereditary sensory and autonomic, type V
NIPA1 Non-imprinted in Prader-Willi/Angelman syndrome 1 608145 15q11.2 43.16 kb • Spastic paraplegia 6
NIPA2 Non-imprinted in Prader-Willi/Angelman syndrome 2 608146 15q11.2 29.74 kb Susceptibility to childhood absence epilepsy
NPSR1 Neuropeptide S receptor 1 608595 7p14.3 220.00 kb • Susceptibility to Asthma
NTF3 Neurotrophin 3 162660 12p13.31 63.19 kb • Severe movement defects of the limbs
NTF4 Neurotrophin 4 162662 19q13.33 3.84 kb • Glaucoma, primary open angle, O
NTRK1 Neurotrophic tyrosine kinase, receptor, type 1 191315 1q23.1 66.10 kb • Hereditary sensory and autonomic neuropathy, type IV
NTRK3 Neurotrophic tyrosine kinase, receptor, type 3 191316 15q25.3 379.67 kb • Susceptibility to tumour development
NUDT3 Nudix (nucleoside diphosphate linked moiety X)-type motif 3 609228 6p21.2 104.00 kb  
PARK2 Parkinson protein 2, E3 ubiquitin protein ligase (parkin) 602544 6q26 1380.25 kb • Parkinson disease 2, juvenile
PON1 Paraoxonase 1 168820 7q21.3 26.21 kb • Susceptibility to coronary artery disease
• Susceptibility to coronary artery spasm 2
• Microvascular complications of diabetes 5
• Sensitivity to organophosphate poisoning
PTGER4 Prostaglandin E receptor 4 (subtype EP4) 601586 5p13.1 1380.25 kb • Susceptibility to Crohn disease
PTPRD Protein tyrosine phosphatase, receptor type, D 601598 9p23 2298.26 kb • Restless legs syndrome 3
SLC6A2 Solute carrier family 6 (neurotransmitter transporter), member 2 163970 16q12.2 50.56 kb • Orthostatic intolerance
SLC6A3 Solute carrier family 6 (neurotransmitter transporter), member 3 126455 5p15.33 52.64 kb • Parkinsonism-dystonia, infantile
• Idiopathic epilepsy
• Dependence on alcohol and cocaine
SLC6A4 Solute carrier family 6 (neurotransmitter transporter), member 4 182138 17q11.2 39.58 kb • Anxiety-related personality traits
• Obsessive-compulsive disorder
• Susceptibility to sudden infant death
SLC9A9 Solute carrier family 9, subfamily A (NHE9, cation proton antiporter 9), member 9 608396 3q24 583.28 kb • Autism susceptibility 16
SNAP25 Synaptosomal-associated protein, 25kDa 600322 20p12-p11.2 88.60 kb  
STX1A Syntaxin 1A (brain) 186590 7q11.23 20.48 kb  
SYP Synaptophysin 313475 Xp11.23 12.40 kb • Mental retardation, X-linked 96
SYT1 Synaptotagmin I 185605 12q21.2 588.02 kb  
TACR1 tachykinin receptor 1 162323 2p13.1 153.06 kb  
TPH2 Tryptophan hydroxylase 2 607478 12q21.1 93.00 kb • Susceptibility to bipolar disorder
• Susceptibility to major depression
TRIM32 Tripartite motif-containing 32 602290 9q33.1 26.65 kb • Bardet-Biedl syndrome 11
• Muscular dystrophy, limb-girdle, type 2H
TSHR Thyroid stimulating hormone receptor 603372 14q31.1 190.80 kb • Hyperthyroidism, familial gestational
• Hyperthyroidism, nonautoimmune
• Hypothyroidism, congenital, nongoitrous, 1
• Thyroid adenoma, hyperfunctioning, somatic
• Thyroid carcinoma with thyrotoxicosis
TUBGCP5 Tubulin, gamma complex associated protein 5 608147 15q11.2 40.49 kb  
UPF3B UPF3 regulator of nonsense transcripts homolog B (yeast) 300298 Xq24-q26 18.00 kb • FG syndrome 6
• Lujan-Fryns syndrome 1
• Mental retardation, 27
VAMP2 Vesicle-associated membrane protein 2 (synaptobrevin 2) 185881 17p13.1 3.83 kb  
XKR4 XK, Kell blood group complex subunit-related family, member 4   8q12.1    
Table 1: Selected genes potentially associated with ADHD.