Incidental Mutation 'R1560:Hmbs'
ID 170557
Institutional Source Beutler Lab
Gene Symbol Hmbs
Ensembl Gene ENSMUSG00000032126
Gene Name hydroxymethylbilane synthase
Synonyms Uros1, Ups, porphobilinogen deaminase, PBGD
MMRRC Submission 039599-MU
Accession Numbers
Essential gene? Essential (E-score: 1.000) question?
Stock # R1560 (G1)
Quality Score 225
Status Not validated
Chromosome 9
Chromosomal Location 44247645-44255525 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) T to C at 44248657 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Histidine to Arginine at position 72 (H72R)
Gene Model predicted gene model for transcript(s): [ENSMUST00000052686] [ENSMUST00000054708] [ENSMUST00000077353] [ENSMUST00000097558] [ENSMUST00000216852] [ENSMUST00000215050] [ENSMUST00000215091]
AlphaFold P22907
Predicted Effect probably benign
Transcript: ENSMUST00000052686
SMART Domains Protein: ENSMUSP00000051432
Gene: ENSMUSG00000049932

DomainStartEndE-ValueType
H2A 3 123 1.64e-81 SMART
Predicted Effect probably benign
Transcript: ENSMUST00000054708
SMART Domains Protein: ENSMUSP00000056282
Gene: ENSMUSG00000032123

DomainStartEndE-ValueType
transmembrane domain 10 32 N/A INTRINSIC
transmembrane domain 60 82 N/A INTRINSIC
Pfam:Glycos_transf_4 100 272 1.1e-38 PFAM
transmembrane domain 277 299 N/A INTRINSIC
transmembrane domain 381 403 N/A INTRINSIC
Predicted Effect probably benign
Transcript: ENSMUST00000077353
AA Change: H256R

PolyPhen 2 Score 0.003 (Sensitivity: 0.98; Specificity: 0.44)
SMART Domains Protein: ENSMUSP00000076575
Gene: ENSMUSG00000032126
AA Change: H256R

DomainStartEndE-ValueType
Pfam:Porphobil_deam 21 233 1.7e-79 PFAM
Pfam:Porphobil_deamC 244 323 6.8e-24 PFAM
Predicted Effect possibly damaging
Transcript: ENSMUST00000097558
AA Change: H239R

PolyPhen 2 Score 0.468 (Sensitivity: 0.89; Specificity: 0.90)
SMART Domains Protein: ENSMUSP00000095166
Gene: ENSMUSG00000032126
AA Change: H239R

DomainStartEndE-ValueType
Pfam:Porphobil_deam 3 219 3.9e-95 PFAM
Pfam:Porphobil_deamC 227 327 4.7e-23 PFAM
Predicted Effect noncoding transcript
Transcript: ENSMUST00000196879
Predicted Effect noncoding transcript
Transcript: ENSMUST00000213709
Predicted Effect noncoding transcript
Transcript: ENSMUST00000214012
Predicted Effect possibly damaging
Transcript: ENSMUST00000216658
AA Change: H72R

PolyPhen 2 Score 0.706 (Sensitivity: 0.86; Specificity: 0.92)
Predicted Effect probably benign
Transcript: ENSMUST00000216852
Predicted Effect probably benign
Transcript: ENSMUST00000215050
Predicted Effect probably benign
Transcript: ENSMUST00000215091
Predicted Effect noncoding transcript
Transcript: ENSMUST00000214967
Predicted Effect noncoding transcript
Transcript: ENSMUST00000215859
Predicted Effect noncoding transcript
Transcript: ENSMUST00000215934
Coding Region Coverage
  • 1x: 99.1%
  • 3x: 98.3%
  • 10x: 96.3%
  • 20x: 92.6%
Validation Efficiency
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: 49 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
2610021A01Rik A G 7: 41,275,466 (GRCm39) T390A probably benign Het
Adamts8 T A 9: 30,867,963 (GRCm39) C596S probably damaging Het
Avl9 T A 6: 56,702,113 (GRCm39) Y89* probably null Het
Cacna1e G A 1: 154,296,850 (GRCm39) R18* probably null Het
Cacng2 A G 15: 77,897,518 (GRCm39) F97S probably benign Het
Calu A G 6: 29,361,657 (GRCm39) D107G probably benign Het
Capns2 G A 8: 93,628,771 (GRCm39) R220Q probably damaging Het
Catsperb C T 12: 101,591,985 (GRCm39) T1105I probably benign Het
Cep350 T C 1: 155,804,825 (GRCm39) N753D possibly damaging Het
D6Ertd527e C G 6: 87,088,506 (GRCm39) T223S unknown Het
Dnah5 G T 15: 28,420,149 (GRCm39) V3816F probably damaging Het
Dzip3 T C 16: 48,771,903 (GRCm39) probably null Het
Ep400 A T 5: 110,818,972 (GRCm39) probably null Het
Epb41l2 T A 10: 25,371,334 (GRCm39) probably null Het
Fetub T C 16: 22,758,117 (GRCm39) V300A probably benign Het
Gabrb3 A T 7: 57,466,043 (GRCm39) M308L probably damaging Het
Galnt16 A T 12: 80,648,566 (GRCm39) D546V possibly damaging Het
Gimap8 G T 6: 48,633,068 (GRCm39) G296W probably damaging Het
Gpr158 A G 2: 21,831,125 (GRCm39) K742E probably damaging Het
Krt16 A G 11: 100,137,475 (GRCm39) I410T probably damaging Het
Lamb3 G A 1: 193,021,710 (GRCm39) A971T probably benign Het
Lilra6 A C 7: 3,914,407 (GRCm39) probably null Het
Mroh7 A T 4: 106,568,451 (GRCm39) M418K possibly damaging Het
Myh11 T A 16: 14,044,484 (GRCm39) K640* probably null Het
Nsd1 T A 13: 55,394,533 (GRCm39) C711* probably null Het
Or1j17 T A 2: 36,578,155 (GRCm39) L47Q probably damaging Het
Or2ak5 A T 11: 58,611,513 (GRCm39) Y120* probably null Het
Or3a10 A G 11: 73,935,441 (GRCm39) S220P probably damaging Het
Or4c111 T C 2: 88,843,550 (GRCm39) Y286C probably damaging Het
Otop3 A T 11: 115,235,289 (GRCm39) H307L possibly damaging Het
Plekhm3 T C 1: 64,976,976 (GRCm39) T165A probably benign Het
Poldip3 G A 15: 83,022,527 (GRCm39) R86W probably damaging Het
Rif1 A T 2: 52,001,143 (GRCm39) R1532S probably damaging Het
Sf3b1 C G 1: 55,058,554 (GRCm39) E12Q possibly damaging Het
Slc27a6 T A 18: 58,712,904 (GRCm39) L242* probably null Het
Spata45 T C 1: 190,772,017 (GRCm39) S80P probably benign Het
Taf4 A G 2: 179,577,746 (GRCm39) V525A probably benign Het
Tbck A G 3: 132,543,809 (GRCm39) T887A probably damaging Het
Tnrc6c C T 11: 117,650,463 (GRCm39) T1571I probably damaging Het
Trim38 A G 13: 23,966,685 (GRCm39) Y44C probably benign Het
Tsg101 A T 7: 46,542,208 (GRCm39) probably null Het
Tsku T A 7: 98,002,151 (GRCm39) D60V probably damaging Het
Ttc28 G A 5: 111,373,543 (GRCm39) S962N probably damaging Het
Upf1 G A 8: 70,791,092 (GRCm39) P550L probably damaging Het
Vipr2 A G 12: 116,058,401 (GRCm39) D106G probably benign Het
Vps13c T C 9: 67,843,745 (GRCm39) probably null Het
Washc4 T C 10: 83,391,973 (GRCm39) Y220H probably damaging Het
Wdr81 C T 11: 75,342,449 (GRCm39) W939* probably null Het
Zfp512b T C 2: 181,230,472 (GRCm39) T473A probably benign Het
Other mutations in Hmbs
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL01526:Hmbs APN 9 44,250,845 (GRCm39) missense possibly damaging 0.91
IGL02312:Hmbs APN 9 44,252,510 (GRCm39) critical splice donor site probably null
R0386:Hmbs UTSW 9 44,248,305 (GRCm39) missense probably benign 0.06
R0411:Hmbs UTSW 9 44,252,949 (GRCm39) nonsense probably null
R0656:Hmbs UTSW 9 44,248,657 (GRCm39) missense probably benign 0.31
R1503:Hmbs UTSW 9 44,248,729 (GRCm39) missense probably benign 0.42
R1953:Hmbs UTSW 9 44,248,741 (GRCm39) missense probably damaging 1.00
R2127:Hmbs UTSW 9 44,252,004 (GRCm39) missense probably benign 0.09
R4637:Hmbs UTSW 9 44,250,834 (GRCm39) missense probably damaging 1.00
R5549:Hmbs UTSW 9 44,250,774 (GRCm39) critical splice donor site probably null
R6611:Hmbs UTSW 9 44,252,988 (GRCm39) missense probably damaging 0.98
R7509:Hmbs UTSW 9 44,248,208 (GRCm39) missense
R7702:Hmbs UTSW 9 44,248,147 (GRCm39) splice site probably null
R8383:Hmbs UTSW 9 44,249,240 (GRCm39) missense probably damaging 1.00
R8506:Hmbs UTSW 9 44,252,921 (GRCm39) critical splice donor site probably null
R9069:Hmbs UTSW 9 44,248,102 (GRCm39) missense possibly damaging 0.79
R9149:Hmbs UTSW 9 44,252,983 (GRCm39) nonsense probably null
R9780:Hmbs UTSW 9 44,247,985 (GRCm39) missense probably damaging 1.00
X0024:Hmbs UTSW 9 44,249,265 (GRCm39) missense possibly damaging 0.89
Predicted Primers PCR Primer
(F):5'- ATGGAAATGACAGTCCCTCCCCTC -3'
(R):5'- TGGTTCATAACCTTTGGCACCTGC -3'

Sequencing Primer
(F):5'- TATGCACTGCTACGGGCAC -3'
(R):5'- GGCACCTGCTATCCATCAAATAAG -3'
Posted On 2014-04-13