Incidental Mutation 'R2127:Hmbs'
ID 227632
Institutional Source Beutler Lab
Gene Symbol Hmbs
Ensembl Gene ENSMUSG00000032126
Gene Name hydroxymethylbilane synthase
Synonyms porphobilinogen deaminase, PBGD, Uros1, Ups
MMRRC Submission 040130-MU
Accession Numbers
Is this an essential gene? Essential (E-score: 1.000) question?
Stock # R2127 (G1)
Quality Score 225
Status Validated
Chromosome 9
Chromosomal Location 44336339-44344228 bp(-) (GRCm38)
Type of Mutation missense
DNA Base Change (assembly) T to C at 44340707 bp (GRCm38)
Zygosity Heterozygous
Amino Acid Change Threonine to Alanine at position 92 (T92A)
Ref Sequence ENSEMBL: ENSMUSP00000095166 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000052686] [ENSMUST00000077353] [ENSMUST00000097558] [ENSMUST00000215091] [ENSMUST00000216852]
AlphaFold P22907
Predicted Effect probably benign
Transcript: ENSMUST00000052686
SMART Domains Protein: ENSMUSP00000051432
Gene: ENSMUSG00000049932

H2A 3 123 1.64e-81 SMART
Predicted Effect probably benign
Transcript: ENSMUST00000077353
AA Change: T109A

PolyPhen 2 Score 0.085 (Sensitivity: 0.93; Specificity: 0.85)
SMART Domains Protein: ENSMUSP00000076575
Gene: ENSMUSG00000032126
AA Change: T109A

Pfam:Porphobil_deam 21 233 1.7e-79 PFAM
Pfam:Porphobil_deamC 244 323 6.8e-24 PFAM
Predicted Effect probably benign
Transcript: ENSMUST00000097558
AA Change: T92A

PolyPhen 2 Score 0.085 (Sensitivity: 0.93; Specificity: 0.85)
SMART Domains Protein: ENSMUSP00000095166
Gene: ENSMUSG00000032126
AA Change: T92A

Pfam:Porphobil_deam 3 219 3.9e-95 PFAM
Pfam:Porphobil_deamC 227 327 4.7e-23 PFAM
Predicted Effect noncoding transcript
Transcript: ENSMUST00000214012
Predicted Effect noncoding transcript
Transcript: ENSMUST00000214967
Predicted Effect probably benign
Transcript: ENSMUST00000215091
Predicted Effect noncoding transcript
Transcript: ENSMUST00000215859
Predicted Effect noncoding transcript
Transcript: ENSMUST00000215934
Predicted Effect probably benign
Transcript: ENSMUST00000216658
Predicted Effect probably benign
Transcript: ENSMUST00000216852
Meta Mutation Damage Score 0.1699 question?
Coding Region Coverage
  • 1x: 99.2%
  • 3x: 98.7%
  • 10x: 97.5%
  • 20x: 95.9%
Validation Efficiency 98% (93/95)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes a member of the hydroxymethylbilane synthase superfamily. The encoded protein is the third enzyme of the heme biosynthetic pathway and catalyzes the head to tail condensation of four porphobilinogen molecules into the linear hydroxymethylbilane. Mutations in this gene are associated with the autosomal dominant disease acute intermittent porphyria. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008]
PHENOTYPE: Mice heterozygous for one null allele and a functional allele with a milder mutation exhibit typical features of acute intermittent porphyria with massive urinary excretion of aminolevulinic acid after phenobarbital treatment, erythruria, ataxia, motor dysfunction, and neurologic muscle atrophy. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 93 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
4930449I24Rik T A 5: 146,504,942 S300T possibly damaging Het
4932431P20Rik T C 7: 29,537,140 noncoding transcript Het
A2ml1 A C 6: 128,558,437 V770G probably damaging Het
Abca6 A G 11: 110,219,649 I558T probably benign Het
Abhd17c C A 7: 84,110,662 G295W probably damaging Het
Actn3 G A 19: 4,871,675 A159V probably damaging Het
Adgrv1 A T 13: 81,557,080 F1537Y probably damaging Het
Agbl1 G T 7: 76,419,880 V373F possibly damaging Het
Aldh1a1 A T 19: 20,642,915 E485D probably benign Het
Amdhd2 A G 17: 24,158,308 probably null Het
Armc3 A G 2: 19,201,811 D15G probably damaging Het
Atp2b2 A G 6: 113,760,650 L921P probably damaging Het
Btbd16 A G 7: 130,784,308 N88S probably benign Het
Capn10 T A 1: 92,938,034 C77* probably null Het
Caskin1 T C 17: 24,496,996 probably null Het
Catsper4 T C 4: 134,213,806 D254G probably benign Het
Catsperg1 T C 7: 29,185,040 D958G probably damaging Het
Ccar2 T G 14: 70,139,651 K787Q probably benign Het
Ccdc191 C T 16: 43,908,635 T244I probably benign Het
Cd33 A T 7: 43,530,275 L243Q possibly damaging Het
Cdc37 T C 9: 21,149,847 Y4C probably damaging Het
Cenpe T G 3: 135,239,780 N1018K probably benign Het
Crocc G A 4: 141,017,096 R1830C probably damaging Het
Csmd1 T C 8: 15,917,392 D3157G probably damaging Het
Dhx57 C T 17: 80,273,048 V492M probably damaging Het
Dnah2 A T 11: 69,458,185 I2486N probably benign Het
Dnhd1 C T 7: 105,693,721 T1424I possibly damaging Het
Dsc3 C T 18: 19,968,354 A661T probably benign Het
F930015N05Rik A G 11: 64,435,403 probably benign Het
Fbxo34 C A 14: 47,530,106 R308S probably damaging Het
Gm11595 A T 11: 99,772,501 C118S unknown Het
Gm9742 A T 13: 8,034,975 noncoding transcript Het
Gmeb2 G A 2: 181,259,049 A185V probably benign Het
Gpr15 A G 16: 58,718,255 V157A possibly damaging Het
Gpr3 C T 4: 133,210,621 A247T probably damaging Het
Grin2b A C 6: 135,778,700 S539A probably benign Het
Inpp4a A G 1: 37,366,919 M173V probably benign Het
Irx4 T A 13: 73,265,476 S22T probably benign Het
Jph3 C T 8: 121,785,142 A623V probably benign Het
Kif1b G A 4: 149,187,640 S1568L possibly damaging Het
Ksr1 G A 11: 79,033,313 S361L probably damaging Het
Lyst T G 13: 13,635,262 Y506D probably damaging Het
Mctp1 A G 13: 76,824,822 D648G probably damaging Het
Megf8 T C 7: 25,364,582 S2788P possibly damaging Het
Mfsd2b T A 12: 4,867,659 Y129F probably benign Het
Mindy4 T C 6: 55,218,265 S155P probably benign Het
Mospd4 A G 18: 46,465,664 noncoding transcript Het
Myo18b A T 5: 112,831,078 L1223Q probably damaging Het
Nckipsd A G 9: 108,811,733 T156A probably benign Het
Ndst1 G A 18: 60,691,208 T799I probably benign Het
Npffr2 A T 5: 89,568,065 I84F probably damaging Het
Nphp3 G A 9: 104,008,243 V167M probably damaging Het
Nup107 C A 10: 117,774,475 R354L possibly damaging Het
Olfml2a T C 2: 38,941,687 C93R probably damaging Het
Olfr1145 A G 2: 87,810,341 I174V probably benign Het
Olfr1157 A T 2: 87,962,832 V20D probably benign Het
Olfr384 C G 11: 73,602,805 S75C possibly damaging Het
Pappa T A 4: 65,297,257 L1134M probably damaging Het
Plscr4 T G 9: 92,488,630 F217V possibly damaging Het
Pnpla8 T A 12: 44,308,057 Y667N probably benign Het
Polg A G 7: 79,464,928 L95P probably damaging Het
Psg20 T G 7: 18,682,718 I158L probably damaging Het
Pwwp2a A G 11: 43,705,318 S437G probably benign Het
Rdx A G 9: 52,069,732 M305V possibly damaging Het
Rinl A G 7: 28,796,743 E383G probably damaging Het
Ror1 A G 4: 100,442,093 M888V probably benign Het
Rps12 A T 10: 23,786,878 I22K possibly damaging Het
Rtca C A 3: 116,497,674 R219L possibly damaging Het
Ryr2 G A 13: 11,712,195 P2427S probably damaging Het
Slc10a6 A G 5: 103,609,056 Y281H probably benign Het
Slc39a11 A G 11: 113,369,803 S176P probably benign Het
Slfn10-ps A G 11: 83,030,342 noncoding transcript Het
Spef2 T C 15: 9,729,661 T124A possibly damaging Het
Sult2a4 G T 7: 13,915,260 P207Q probably damaging Het
Tas1r3 G A 4: 155,860,470 R765C probably damaging Het
Tcstv1 T C 13: 119,893,746 T117A probably damaging Het
Tha1 A G 11: 117,869,774 V208A probably damaging Het
Tmbim4 T A 10: 120,224,753 I215N probably damaging Het
Tmem202 T A 9: 59,520,200 I122F probably benign Het
Tomm70a T C 16: 57,121,871 S4P unknown Het
Tpcn2 A G 7: 145,273,975 probably benign Het
Trim36 A T 18: 46,212,337 F10I probably benign Het
Usp30 A G 5: 114,111,163 E176G probably damaging Het
Usp8 T G 2: 126,737,575 probably null Het
Vmn1r32 T A 6: 66,553,549 Y81F probably benign Het
Vps36 G T 8: 22,218,289 probably null Het
Wnt3 A G 11: 103,812,648 H319R possibly damaging Het
Zfp319 A T 8: 95,323,763 probably benign Het
Zfp408 T C 2: 91,645,174 E545G probably damaging Het
Zfp799 C T 17: 32,819,498 R598Q possibly damaging Het
Zfp831 T C 2: 174,648,124 V1228A probably benign Het
Zfp938 T C 10: 82,226,042 D248G probably benign Het
Other mutations in Hmbs
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL01526:Hmbs APN 9 44339548 missense possibly damaging 0.91
IGL02312:Hmbs APN 9 44341213 critical splice donor site probably null
R0386:Hmbs UTSW 9 44337008 missense probably benign 0.06
R0411:Hmbs UTSW 9 44341652 nonsense probably null
R0656:Hmbs UTSW 9 44337360 missense probably benign 0.31
R1503:Hmbs UTSW 9 44337432 missense probably benign 0.42
R1560:Hmbs UTSW 9 44337360 missense possibly damaging 0.71
R1953:Hmbs UTSW 9 44337444 missense probably damaging 1.00
R4637:Hmbs UTSW 9 44339537 missense probably damaging 1.00
R5549:Hmbs UTSW 9 44339477 critical splice donor site probably null
R6611:Hmbs UTSW 9 44341691 missense probably damaging 0.98
R7509:Hmbs UTSW 9 44336911 missense
R7702:Hmbs UTSW 9 44336850 splice site probably null
R8383:Hmbs UTSW 9 44337943 missense probably damaging 1.00
R8506:Hmbs UTSW 9 44341624 critical splice donor site probably null
R9069:Hmbs UTSW 9 44336805 missense possibly damaging 0.79
R9149:Hmbs UTSW 9 44341686 nonsense probably null
X0024:Hmbs UTSW 9 44337968 missense possibly damaging 0.89
Predicted Primers PCR Primer

Sequencing Primer
Posted On 2014-09-17