Incidental Mutation 'R0038:Polr1b'
ID15717
Institutional Source Beutler Lab
Gene Symbol Polr1b
Ensembl Gene ENSMUSG00000027395
Gene Namepolymerase (RNA) I polypeptide B
Synonyms128kDa, RPA116, RPA2, D630020H17Rik, Rpo1-2
MMRRC Submission 038332-MU
Accession Numbers

Ncbi RefSeq: NM_009086.2; MGI:108014

Is this an essential gene? Essential (E-score: 1.000) question?
Stock #R0038 (G1)
Quality Score
Status Validated
Chromosome2
Chromosomal Location129100995-129126594 bp(+) (GRCm38)
Type of Mutationnonsense
DNA Base Change (assembly) C to T at 129115668 bp
ZygosityHeterozygous
Amino Acid Change Arginine to Stop codon at position 548 (R548*)
Ref Sequence ENSEMBL: ENSMUSP00000099494 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000028874] [ENSMUST00000103205]
Predicted Effect probably null
Transcript: ENSMUST00000028874
AA Change: R548*
SMART Domains Protein: ENSMUSP00000028874
Gene: ENSMUSG00000027395
AA Change: R548*

DomainStartEndE-ValueType
Pfam:RNA_pol_Rpb2_1 37 437 4.6e-35 PFAM
Pfam:RNA_pol_Rpb2_2 186 375 8.9e-14 PFAM
Pfam:RNA_pol_Rpb2_3 455 521 1.4e-28 PFAM
Pfam:RNA_pol_Rpa2_4 563 621 3.6e-25 PFAM
Predicted Effect probably null
Transcript: ENSMUST00000103205
AA Change: R548*
SMART Domains Protein: ENSMUSP00000099494
Gene: ENSMUSG00000027395
AA Change: R548*

DomainStartEndE-ValueType
Pfam:RNA_pol_Rpb2_1 37 423 1.7e-35 PFAM
Pfam:RNA_pol_Rpb2_2 186 375 3.2e-11 PFAM
Pfam:RNA_pol_Rpb2_3 455 520 2.1e-29 PFAM
Pfam:RNA_pol_Rpa2_4 563 621 4.1e-23 PFAM
Pfam:RNA_pol_Rpb2_6 670 1031 9.7e-118 PFAM
Pfam:RNA_pol_Rpb2_7 1033 1135 1.2e-22 PFAM
Predicted Effect noncoding transcript
Transcript: ENSMUST00000133345
Predicted Effect noncoding transcript
Transcript: ENSMUST00000144004
Meta Mutation Damage Score 0.65 question?
Coding Region Coverage
  • 1x: 83.6%
  • 3x: 76.1%
  • 10x: 58.6%
  • 20x: 40.4%
Validation Efficiency 91% (67/74)
MGI Phenotype Strain: 3774130
Lethality: E2-E4
FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] Eukaryotic RNA polymerase I (pol I) is responsible for the transcription of ribosomal RNA (rRNA) genes and production of rRNA, the primary component of ribosomes. Pol I is a multisubunit enzyme composed of 6 to 14 polypeptides, depending on the species. Most of the mass of the pol I complex derives from the 2 largest subunits, Rpa1 and Rpa2 in yeast. POLR1B is homologous to Rpa2 (Seither and Grummt, 1996 [PubMed 8921381]).[supplied by OMIM, Mar 2008]
PHENOTYPE: Mice homozygous for a gene trapped allele exhibit embryonic lethality prior to implantation. [provided by MGI curators]
Allele List at MGI

All alleles(18) : Gene trapped(18)

Other mutations in this stock
Total: 30 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Agfg1 T C 1: 82,886,102 probably benign Het
Ahnak2 T C 12: 112,774,462 T253A probably benign Het
Ankrd28 A T 14: 31,708,035 M892K probably damaging Het
Arhgef25 T C 10: 127,186,865 probably benign Het
Cldn8 A G 16: 88,563,034 M1T probably null Het
Clec11a A G 7: 44,306,482 probably benign Het
Ddx39 T C 8: 83,722,498 L305P probably damaging Het
Depdc5 A G 5: 32,868,853 E60G probably benign Het
Etl4 A T 2: 20,743,574 H39L probably damaging Het
Gramd1b G A 9: 40,317,526 T252M probably damaging Het
Hcrtr2 A T 9: 76,259,681 S125T probably benign Het
Htr2a T G 14: 74,706,247 S422R probably benign Het
Kirrel3 T A 9: 34,911,770 probably null Het
Krtap9-5 G A 11: 99,948,602 C43Y possibly damaging Het
Lama2 T C 10: 26,986,797 D2990G probably benign Het
Ncor1 A G 11: 62,392,551 F437L probably damaging Het
Nlrp1b A G 11: 71,172,171 S685P possibly damaging Het
Oog4 T C 4: 143,438,944 D211G probably benign Het
Pcdh15 A T 10: 74,643,440 E723V possibly damaging Het
Pgm3 A T 9: 86,564,673 probably benign Het
Pnpla5 A G 15: 84,122,513 Y90H probably damaging Het
Rnf168 T C 16: 32,298,995 V458A probably benign Het
Rnf32 T C 5: 29,205,654 probably benign Het
Sclt1 T C 3: 41,629,508 probably benign Het
Serpina12 A G 12: 104,037,957 F139L probably damaging Het
Stag3 T A 5: 138,301,036 probably null Het
Stard5 T C 7: 83,636,743 probably benign Het
Suclg1 A G 6: 73,260,503 E77G probably benign Het
Ush2a G T 1: 188,626,612 G2112C probably benign Het
Zfp644 T G 5: 106,635,043 E1155A probably benign Het
Other mutations in Polr1b
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00489:Polr1b APN 2 129125909 missense probably damaging 1.00
IGL00559:Polr1b APN 2 129113731 missense probably damaging 1.00
IGL00659:Polr1b APN 2 129118100 critical splice donor site probably null
IGL00672:Polr1b APN 2 129125472 missense probably damaging 1.00
IGL01066:Polr1b APN 2 129119152 missense probably damaging 1.00
IGL01536:Polr1b APN 2 129125555 missense probably benign 0.00
IGL01596:Polr1b APN 2 129110126 missense probably benign 0.38
IGL02156:Polr1b APN 2 129123879 missense probably benign 0.40
IGL02398:Polr1b APN 2 129102966 missense probably benign 0.03
IGL02797:Polr1b APN 2 129102979 missense probably damaging 0.99
IGL02965:Polr1b APN 2 129125523 missense probably benign 0.41
IGL03009:Polr1b APN 2 129126068 missense probably damaging 1.00
IGL03092:Polr1b APN 2 129123129 missense probably damaging 1.00
IGL03129:Polr1b APN 2 129115707 missense probably benign 0.00
IGL03138:Polr1b UTSW 2 129102988 missense probably benign 0.04
PIT4362001:Polr1b UTSW 2 129109292 missense possibly damaging 0.84
R0038:Polr1b UTSW 2 129115668 nonsense probably null
R0989:Polr1b UTSW 2 129126077 missense probably damaging 0.97
R1508:Polr1b UTSW 2 129113734 missense probably benign 0.24
R1539:Polr1b UTSW 2 129118099 critical splice donor site probably null
R1700:Polr1b UTSW 2 129123121 missense probably damaging 0.99
R1843:Polr1b UTSW 2 129102966 missense probably benign 0.03
R1920:Polr1b UTSW 2 129101111 missense probably benign 0.00
R2414:Polr1b UTSW 2 129103134 splice site probably benign
R3020:Polr1b UTSW 2 129115681 missense probably benign 0.01
R3837:Polr1b UTSW 2 129119107 missense possibly damaging 0.78
R4466:Polr1b UTSW 2 129123882 missense probably benign 0.03
R4773:Polr1b UTSW 2 129105328 missense probably benign 0.29
R4789:Polr1b UTSW 2 129109337 missense probably benign 0.00
R5027:Polr1b UTSW 2 129123883 missense possibly damaging 0.94
R5579:Polr1b UTSW 2 129110108 missense probably damaging 1.00
R5705:Polr1b UTSW 2 129105351 nonsense probably null
R6303:Polr1b UTSW 2 129115762 missense probably damaging 1.00
R6313:Polr1b UTSW 2 129125446 missense probably damaging 1.00
R6427:Polr1b UTSW 2 129123261 missense probably damaging 0.99
R6677:Polr1b UTSW 2 129120211 intron probably benign
R7033:Polr1b UTSW 2 129115642 missense possibly damaging 0.82
R7163:Polr1b UTSW 2 129126011 missense probably benign 0.44
R7184:Polr1b UTSW 2 129123922 missense possibly damaging 0.94
Protein Function and Prediction

Polr1b encodes RPA2, one of the ubiquitously expressed subunits of the Pol I enzyme that facilitates that transcription of ribosomal RNA (rRNA) genes and rRNA (1;2).

Background

Polr1bGt(Ayu8019)Imeg/ Gt(Ayu8019)Imeg; MGI:3774130

involves: C57BL/6 * C57BL/6J * CBA

Heterozygous mice displayed no obvious phenotype (2). In contrast, homozygous mutant embryos could develop to the morula stage, but thereafter they displayed nucleolar disruption and apoptosis, which resulted in death (2).

References
Posted On2012-12-21
Science WriterAnne Murray