ITIH6

gene
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Also known as UNQ6369

Summary

ITIH6 (inter-alpha-trypsin inhibitor heavy chain family member 6, HGNC:28907) is a protein-coding gene on chromosome Xp11.22, encoding Inter-alpha-trypsin inhibitor heavy chain H6 (Q6UXX5).

The protein encoded by this gene belongs to the interalpha trypsin inhibitor heavy chain (ITIH) family. Interalpha trypsin inhibitor (ITI) is composed of two heavy chains (containing VWA domain) and one light chain. The light chain confers the protease-inhibitor function, while the heavy chains are involved in mediating protein-protein interactions with the components of the extracellular matrix.

Source: NCBI Gene 347365 — RefSeq curated summary.

At a glance

  • GWAS associations: 1
  • Clinical variants (ClinVar): 260 total — 1 pathogenic
  • MANE Select transcript: NM_198510

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:28907
Approved symbolITIH6
Nameinter-alpha-trypsin inhibitor heavy chain family member 6
LocationXp11.22
Locus typegene with protein product
StatusApproved
AliasesUNQ6369
Ensembl geneENSG00000102313
Ensembl biotypeprotein_coding
Entrez347365

Gene structure

Transcript identifiers

Ensembl transcripts: 2 — 1 protein_coding, 1 protein_coding_CDS_not_defined

ENST00000218436, ENST00000498398

RefSeq mRNA: 1 — MANE Select: NM_198510 NM_198510

CCDS: CCDS14361

Canonical transcript exons

ENST00000218436 — 13 exons

ExonStartEnd
ENSE000006716945475365154753764
ENSE000006716965475975654759927
ENSE000008213815475100354751380
ENSE000008213845479192654792036
ENSE000013313705474891854750106
ENSE000013357655479083754791084
ENSE000013357775478848054788649
ENSE000013357785479694254797096
ENSE000013804375477408154774197
ENSE000013834395475393054753965
ENSE000014195415479810954798255
ENSE000014352595475501754755109
ENSE000014656995475696554758998

Expression profiles

Bgee: expression breadth broad, 19 present calls, max score 74.81.

FANTOM5 (CAGE): breadth tissue_specific, TPM avg 0.0471 / max 39.6316, expressed in 8 samples.

FANTOM5 promoters (1 alternative TSS)

Promoter IDTPM avgSamples expressed
1993970.04718

Top tissues by expression

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

TissueAnatomy IDExpression scoreQuality
cartilage tissueUBERON:000241874.81gold quality
gastrocnemiusUBERON:000138870.32gold quality
muscle of legUBERON:000138368.39gold quality
hindlimb stylopod muscleUBERON:000425264.70gold quality
buccal mucosa cellCL:000233662.81gold quality
pancreatic ductal cellCL:000207962.78silver quality
epithelial cell of pancreasCL:000008354.99gold quality
tendon of biceps brachiiUBERON:000818854.89gold quality
cardiac muscle of right atriumUBERON:000337954.34gold quality
skeletal muscle tissueUBERON:000113454.33gold quality
left ventricle myocardiumUBERON:000656654.23gold quality
heart right ventricleUBERON:000208054.18gold quality
primordial germ cell in gonadCL:0000670 ∩ UBERON:000099154.12gold quality
kidney epitheliumUBERON:000481953.93gold quality
upper arm skinUBERON:000426353.52gold quality
muscle tissueUBERON:000238553.05gold quality
nasal cavity epitheliumUBERON:000538452.16gold quality
colonic epitheliumUBERON:000039750.25gold quality
myocardiumUBERON:000234950.25gold quality
tibialis anteriorUBERON:000138550.11silver quality
deltoidUBERON:000147649.52gold quality
medial globus pallidusUBERON:000247749.03gold quality
olfactory segment of nasal mucosaUBERON:000538647.78gold quality
quadriceps femorisUBERON:000137747.29gold quality
globus pallidusUBERON:000187547.02gold quality
ileal mucosaUBERON:000033146.40silver quality
nasal cavity mucosaUBERON:000182646.29gold quality
vastus lateralisUBERON:000137946.07gold quality
upper leg skinUBERON:000426246.04silver quality
skin of hipUBERON:000155443.82silver quality

Single-cell (SCXA)

Detected in 2 experiment(s), a significant marker in 1.

ExperimentMarker?Max mean expression
E-ANND-3yes3.93
E-GEOD-81383no167.12

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

39 targeting ITIH6, 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-9-5P100.0072.282361
HSA-MIR-4713-3P100.0065.92505
HSA-MIR-1252-5P100.0069.802774
HSA-MIR-6867-5P100.0082.213464
HSA-MIR-4682100.0068.891258
HSA-MIR-150-5P99.9966.691976
HSA-MIR-806899.9873.852376
HSA-MIR-27A-3P99.9872.132955
HSA-MIR-27B-3P99.9872.132955
HSA-MIR-998599.9872.112939
HSA-MIR-7-1-3P99.9171.534384
HSA-MIR-7-2-3P99.9171.404394
HSA-MIR-498-3P99.9171.271114
HSA-MIR-4713-5P99.7867.801794
HSA-MIR-120899.7068.281533
HSA-MIR-58799.6470.862611
HSA-MIR-29899.6367.561916
HSA-MIR-205399.5769.151635
HSA-MIR-5584-5P99.4968.222814
HSA-MIR-612899.3367.831581
HSA-MIR-149-5P99.2567.161315
HSA-MIR-593-3P99.2267.281327
HSA-MIR-892C-5P99.1670.562116
HSA-MIR-6780B-3P99.1367.18622
HSA-MIR-4711-3P98.9766.871020
HSA-MIR-873-5P98.8466.901348
HSA-MIR-6889-3P98.8467.351198
HSA-MIR-4716-5P98.8268.571168
HSA-MIR-501-5P98.7768.881328
HSA-MIR-6529-3P98.6866.761020

Cross-species orthologs

3 orthologs

OrganismSymbolGene ID
danio_rerioitih6ENSDARG00000056037
mus_musculusItih6ENSMUSG00000087149
rattus_norvegicusItih6ENSRNOG00000069211

Paralogs (11): ITIH4 (ENSG00000055955), ITIH1 (ENSG00000055957), PARP4 (ENSG00000102699), VWA5A (ENSG00000110002), ITIH5 (ENSG00000123243), VWA5B2 (ENSG00000145198), ITIH2 (ENSG00000151655), VWA5B1 (ENSG00000158816), ITIH3 (ENSG00000162267), VWA3B (ENSG00000168658), VWA3A (ENSG00000175267)

Protein

Protein identifiers

Inter-alpha-trypsin inhibitor heavy chain H6Q6UXX5 (reviewed: Q6UXX5)

Alternative names: Inter-alpha-trypsin inhibitor heavy chain H5-like protein

All UniProt accessions (1): Q6UXX5

UniProt curated annotations — full annotation on UniProt →

Subcellular location. Secreted.

Similarity. Belongs to the ITIH family.

RefSeq proteins (1): NP_940912* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR002035VWF_ADomain
IPR010600ITI_HC_CDomain
IPR013694VITDomain
IPR036465vWFA_dom_sfHomologous_superfamily
IPR050934ITIHFamily

Pfam: PF00092, PF06668, PF08487

UniProt features (22 total): glycosylation site 6, compositionally biased region 4, sequence variant 4, region of interest 4, domain 2, signal peptide 1, chain 1

Structure

Experimental structures (PDB)

0 structures.

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q6UXX5-F165.330.29

Functional residue map

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

Glycosylation sites (6): 83, 374, 540, 594, 971, 1231

Function

Pathways and Gene Ontology

Reactome pathways

0 pathways

MSigDB gene sets: 37 (showing top): GOBP_CARBOHYDRATE_DERIVATIVE_METABOLIC_PROCESS, GOBP_HYALURONAN_METABOLIC_PROCESS, GOBP_AMINOGLYCAN_METABOLIC_PROCESS, TGGNNNNNNKCCAR_UNKNOWN, DBP_Q6, HOXA4_Q2, GOMF_PEPTIDASE_REGULATOR_ACTIVITY, GOMF_SERINE_TYPE_ENDOPEPTIDASE_INHIBITOR_ACTIVITY, GOMF_ENZYME_INHIBITOR_ACTIVITY, GOMF_ENZYME_REGULATOR_ACTIVITY, chrXp11, ZWANG_TRANSIENTLY_UP_BY_2ND_EGF_PULSE_ONLY, GOMF_ENDOPEPTIDASE_REGULATOR_ACTIVITY, MIR7_1_3P, MIR7_2_3P

GO Biological Process (1): hyaluronan metabolic process (GO:0030212)

GO Molecular Function (3): serine-type endopeptidase inhibitor activity (GO:0004867), protein binding (GO:0005515), peptidase inhibitor activity (GO:0030414)

GO Cellular Component (1): extracellular region (GO:0005576)

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
glycosaminoglycan metabolic process1
serine-type endopeptidase activity1
endopeptidase inhibitor activity1
binding1
enzyme inhibitor activity1
peptidase activity1
peptidase regulator activity1
cellular anatomical structure1

Protein interactions and networks

STRING

932 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
ITIH6OR6C65A6NJZ3667
ITIH6GUCY2FP51841492
ITIH6INTS6LQ5JSJ4478
ITIH6AWAT1Q58HT5450
ITIH6ZNF630Q2M218447
ITIH6GLT8D1Q68CQ7438
ITIH6SATL1Q86VE3434
ITIH6MTRNR2L10P0CJ77418
ITIH6VCF2Q5XKR9393
ITIH6CFAP47Q6ZTR5386
ITIH6PAGE2BQ5JRK9380
ITIH6GPM6BQ13491376
ITIH6RAB9AP51151375
ITIH6ZNF142P52746373
ITIH6OR6C6A6NF89368

IntAct

27 interactions, top by confidence:

ABTypeScore
KRTAP6-1ITIH6psi-mi:“MI:0915”(physical association)0.560
ANKS1AITIH6psi-mi:“MI:0915”(physical association)0.560
SMIM29ITIH6psi-mi:“MI:0915”(physical association)0.560
ITIH6ZNF414psi-mi:“MI:0915”(physical association)0.560
TLX3ITIH6psi-mi:“MI:0915”(physical association)0.560
VENTXITIH6psi-mi:“MI:0915”(physical association)0.560
KPRPITIH6psi-mi:“MI:0915”(physical association)0.560
EVX2ITIH6psi-mi:“MI:0915”(physical association)0.560
CskCELF2psi-mi:“MI:0914”(association)0.350
ITIH6CNPY4psi-mi:“MI:0914”(association)0.350
KRTAP6-1ITIH6psi-mi:“MI:0915”(physical association)0.000
ANKS1AITIH6psi-mi:“MI:0915”(physical association)0.000
SMIM29ITIH6psi-mi:“MI:0915”(physical association)0.000
ZNF414ITIH6psi-mi:“MI:0915”(physical association)0.000
TLX3ITIH6psi-mi:“MI:0915”(physical association)0.000
VENTXITIH6psi-mi:“MI:0915”(physical association)0.000
KPRPITIH6psi-mi:“MI:0915”(physical association)0.000
EVX2ITIH6psi-mi:“MI:0915”(physical association)0.000

BioGRID (14): ITIH6 (Affinity Capture-MS), ITIH6 (Two-hybrid), ZNF414 (Two-hybrid), VENTX (Two-hybrid), TLX3 (Two-hybrid), EVX2 (Two-hybrid), KRTAP6-1 (Two-hybrid), C6orf1 (Two-hybrid), KPRP (Two-hybrid), KIAA1522 (Affinity Capture-MS), CNPY4 (Affinity Capture-MS), FKBP14 (Affinity Capture-MS), TIMM21 (Cross-Linking-MS (XL-MS)), ITIH6 (Cross-Linking-MS (XL-MS))

ESM2 similar proteins: A2RU67, D3YX43, D3ZWJ9, D5K8A9, E9Q8Q8, O70540, P0CI71, P17813, P28906, P37176, P40967, P51693, P59383, Q03157, Q06154, Q08DV9, Q14956, Q17R55, Q3U3D7, Q3ULW6, Q5F3L3, Q5R6F5, Q5SZV5, Q60696, Q60943, Q61826, Q63961, Q64314, Q6P7C7, Q6UXX5, Q7TN88, Q7Z442, Q866Y3, Q8BYI8, Q8C0Z1, Q8CB67, Q8K4C2, Q8N3G9, Q8R526, Q8VHF2

Diamond homologs: A2VE29, A6X935, O02668, P19823, P19827, P56652, P79263, P97278, P97279, P97280, Q06033, Q0VCM5, Q14624, Q29052, Q3T052, Q5RB37, Q5RER0, Q61702, Q61703, Q61704, Q63416, Q6UXX5, Q86UX2, Q8BJD1, Q9GLY5, A8XP97, P34374, P56651, A1A5Q7, Q5RJF7, A6NCI4, Q8CFG5, Q8IZS8, Q9Z1L5, Q3UVV9, Q9ZQ46

SIGNOR signaling

0 interactions.

Disease & clinical

Clinical variants and AI predictions

ClinVar

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

ClassificationCount (floor)
Pathogenic1
Likely pathogenic0
Uncertain significance207
Likely benign20
Benign4

Top pathogenic / likely-pathogenic (1)

Variant IDHGVSClassification
599598NM_198510.3(ITIH6):c.2377C>T (p.Gln793Ter)Pathogenic

SpliceAI

2220 predictions. Top by Δscore:

VariantEffectΔscore
X:54753645:TCTTA:Tdonor_loss1.0000
X:54753646:CTTA:Cdonor_loss1.0000
X:54753647:TTA:Tdonor_loss1.0000
X:54753648:TAC:Tdonor_loss1.0000
X:54753650:C:Adonor_loss1.0000
X:54753762:CCA:Cacceptor_gain1.0000
X:54753763:CAC:Cacceptor_gain1.0000
X:54753765:C:CCacceptor_gain1.0000
X:54755039:T:TAdonor_gain1.0000
X:54759754:A:ACdonor_gain1.0000
X:54759754:ACAG:Adonor_gain1.0000
X:54759754:ACAGC:Adonor_gain1.0000
X:54759755:C:CCdonor_gain1.0000
X:54759755:CA:Cdonor_gain1.0000
X:54759755:CAGC:Cdonor_gain1.0000
X:54759755:CAGCC:Cdonor_gain1.0000
X:54759767:T:TAdonor_gain1.0000
X:54759937:A:Cacceptor_gain1.0000
X:54759941:A:Cacceptor_gain1.0000
X:54791922:TTA:Tdonor_loss1.0000
X:54791923:TA:Tdonor_loss1.0000
X:54791924:A:ACdonor_gain1.0000
X:54791924:A:ATdonor_loss1.0000
X:54791925:C:CCdonor_gain1.0000
X:54792032:TGGTC:Tacceptor_gain1.0000
X:54792033:GGTC:Gacceptor_gain1.0000
X:54792034:GTC:Gacceptor_gain1.0000
X:54792035:TC:Tacceptor_gain1.0000
X:54792035:TCCT:Tacceptor_loss1.0000
X:54792036:CCTAA:Cacceptor_gain1.0000

AlphaMissense

8453 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
X:54791021:A:CF144L0.992
X:54791021:A:TF144L0.992
X:54791023:A:GF144L0.992
X:54791022:A:GF144S0.989
X:54791063:G:CF130L0.984
X:54791063:G:TF130L0.984
X:54791065:A:GF130L0.984
X:54759859:A:CF324L0.981
X:54759859:A:TF324L0.981
X:54759861:A:GF324L0.981
X:54797035:A:TV55D0.981
X:54797030:A:GS57P0.980
X:54788523:A:TV248D0.978
X:54797016:A:CN61K0.978
X:54797016:A:TN61K0.978
X:54796986:A:CF71L0.977
X:54796986:A:TF71L0.977
X:54796988:A:GF71L0.977
X:54796994:C:GA69P0.977
X:54791064:A:GF130S0.976
X:54796987:A:GF71S0.975
X:54797081:A:CY40D0.974
X:54796948:A:GF84S0.973
X:54788529:A:GF246S0.970
X:54791016:A:GL146P0.970
X:54751053:A:GF1227S0.968
X:54796981:A:GL73P0.967
X:54788564:C:AQ234H0.966
X:54788564:C:GQ234H0.966
X:54751207:A:GW1176R0.965

dbSNP variants (sampled 300 via entrez): RS1000070996 (X:54786902 G>A), RS1000084327 (X:54775531 A>G), RS1000237378 (X:54754943 C>T), RS1000287836 (X:54775942 A>T), RS1000444449 (X:54795998 G>A), RS1000490930 (X:54756371 C>T), RS1000711768 (X:54766010 C>G), RS1000835782 (X:54795712 C>G), RS1000911886 (X:54748944 T>C), RS1000941678 (X:54757333 G>A), RS1001167024 (X:54763624 T>A), RS1001181409 (X:54794162 G>A), RS1001394401 (X:54796372 A>G), RS1001530465 (X:54752146 A>G), RS1001594446 (X:54752487 G>T)

Disease associations

OMIM: gene `` | disease phenotypes:

GenCC curated gene-disease

Mondo (1): neurodevelopmental disorder (MONDO:0700092)

Orphanet (0):

HPO phenotypes

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

GWAS associations

1 associations (top):

StudyTraitp-value
GCST002789_2Egg allergy2.000000e-06

EFO canonical traits (1, from GWAS)

EFO IDTrait name
EFO:0007018egg allergy measurement

MeSH disease descriptors (1)

DescriptorNameTree numbers
D065886Neurodevelopmental DisordersF03.625

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

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

CTD chemical–gene interactions

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

ChemicalActions (top 5)PubMed papers
Resveratrolaffects cotreatment, decreases expression2
bisphenol Aincreases methylation1
ferrous chloridedecreases expression1
CGP 52608affects binding, increases reaction1
Benzo(a)pyreneaffects methylation, decreases methylation1
Copperdecreases expression, affects cotreatment1
Plant Extractsdecreases expression, affects cotreatment1

Clinical trials (associated diseases)

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

TrialPhaseStatusTitle
NCT04586348PHASE4UNKNOWNPrenatal Iodine Supplementation and Early Childhood Neurodevelopment
NCT04873115PHASE4UNKNOWNDouble-blind, Placebo-controlled, Randomized Clinical Trial Comparing the Efficacy and Safety of Sialanar Plus orAl rehabiLitation Against Placebo Plus Oral Rehabilitation for chIldren and Adolescents With seVere Sialorrhoea and Neurodisabilties,
NCT02559102PHASE3COMPLETEDDexmedetomidine Sedation Versus General Anaesthesia for Inguinal Hernia Surgery in Infants
NCT02757079PHASE3COMPLETEDStudy of the Efficacy and Safety of NPC-15 for Sleep Disorders of Children With Neurodevelopmental Disorders
NCT06915480PHASE3RECRUITINGReducing Missed Appointments
NCT07377032PHASE3RECRUITINGTAP-GRIN: Interventional Study on Patients With GRIN-related Neurodevelopmental Disorders
NCT02909959PHASE2COMPLETEDSulforaphane for the Treatment of Young Men With Autism Spectrum Disorder
NCT06081348PHASE2RECRUITINGSertraline vs. Placebo in the Treatment of Anxiety in Children and AdoLescents With NeurodevelopMental Disorders
NCT06352372PHASE2COMPLETEDSafety and Efficacy of tPBM for Epileptiform Activity in Autism
NCT00503191PHASE1COMPLETEDNeuroModulation Technique Treatment of Autism
NCT04475848PHASE1COMPLETEDA Study to Investigate the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics and Food Effect of RO6953958 in Healthy Participants
NCT06300398PHASE1COMPLETEDIAMA-6 Oral Dose Study in Healthy Adults
NCT01783041PHASE2/PHASE3COMPLETEDEffect of Early L-Carnitine Supplementation on Neurodevelopmental Outcomes in Very Preterm Infants
NCT05767385PHASE2/PHASE3RECRUITINGFetal Cerebrovascular Autoregulation in Congenital Heart Disease and Association With Neonatal Neurobehavior
NCT05675098EARLY_PHASE1NOT_YET_RECRUITINGCentral Nervous System Stimulants and Physical Function in Children With Cerebral Palsy
NCT00783783Not specifiedCOMPLETEDCYP2D6 Pharmacogenetics in Risperidone-Treated Children
NCT01778504Not specifiedRECRUITINGStudying Childhood-onset Behavioral, Psychiatric, and Developmental Disorders
NCT01850784Not specifiedUNKNOWNHigh Energy Formula Feeding in Infants With Congenital Heart Disease
NCT01922791Not specifiedCOMPLETEDNutrition and Pregnancy Intervention Study
NCT01942525Not specifiedUNKNOWNInfluence of Intrauterine Growth Restriction on Amplitude-integrated EEG in Preterm Infants
NCT02003170Not specifiedCOMPLETEDEtiology and Early Diagnosis of Neurodevelopmental Disorders
NCT02118649Not specifiedACTIVE_NOT_RECRUITINGEnhancing Behavior and Brain Response to Visual Targets Using a Computer Game
NCT02557191Not specifiedTERMINATEDBiomarkers, Neurodevelopment and Preterm Infants
NCT02690675Not specifiedCOMPLETEDIron Supplement Effect on Child Development
NCT02694003Not specifiedCOMPLETEDBetter Nights, Better Days for Children With Neurodevelopment Disorders
NCT02792894Not specifiedCOMPLETEDFamily Networks (FaNs) for Children With Developmental Disorders and Delays
NCT02871674Not specifiedUNKNOWNGood Night Project: Behavioural Sleep Interventions for Children With ADHD: A Randomised Controlled Trial
NCT02887157Not specifiedCOMPLETEDAnalyzing Retinal Microanatomy in ROP
NCT02898298Not specifiedCOMPLETEDPositive Emotion Regulation Training in Children, Adolescents and Young Adults With and Without Developmental Disorder
NCT02912780Not specifiedUNKNOWNIntroduction of Microsystems in a Level 3 Neonatal Intensive Care Unit
NCT03023293Not specifiedCOMPLETEDn-3 PUFAs, Irisin and Maternal Glucose Metabolism From Pregnancy to Postpartum
NCT03023644Not specifiedCOMPLETEDImproving Neurodevelopmental Outcomes in Children With Congenital Heart Disease: An Intervention Study
NCT03032991Not specifiedUNKNOWNEarly Biomarkers of Neurodevelopment in Offspring of Diabetic Mothers
NCT03088189Not specifiedTERMINATEDEffect of Parental Peri-conceptional Vitamin B12 Supplementation on Infant Neurocognitive Development in Offspring
NCT03096028Not specifiedCOMPLETEDDevelopmental Origins of Mental Health Disorders
NCT03148782Not specifiedCOMPLETEDBrain Plasticity Underlying Acquisition of New Organizational Skills in Children-R61 Phase
NCT03172104Not specifiedCOMPLETEDNeurobehavioural Development of Infants Born <30 Weeks Gestational Age Between Birth and Five Years of Age
NCT03222375Not specifiedRECRUITINGSQUED™ Series 28.1 Home-use and Treatment of Autowave Reverberator of Autism
NCT03229928Not specifiedCOMPLETEDClinical Testing of a Real-Time Behavior Measurement Tool: Measuring Outcomes for CHAnge
NCT03232489Not specifiedUNKNOWNStudy for the Evaluation of the Feasibility of Applying Advanced MRI Scanning in Pediatric Clinical Practice

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