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UniProtKB/Swiss-Prot O15160: Variant p.Asn32Ile

DNA-directed RNA polymerases I and III subunit RPAC1
Gene: POLR1C
Variant information

Variant position:  32
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  LP/P [Disclaimer]
The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance

Residue change:  From Asparagine (N) to Isoleucine (I) at position 32 (N32I, p.Asn32Ile).
Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.

Physico-chemical properties:  Change from medium size and polar (N) to medium size and hydrophobic (I)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -3
The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page

Variant description:  In HLD11; decreased localization to the nucleus and retained in the cytoplasm; loss of association with RNA polymerase III-transcribed genes; decreased association with RNA polymerase III complex; probably prevents RNA polymerase III complex assembly and activity.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  32
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  346
The length of the canonical sequence.

Location on the sequence:   SRVVLGEFGVRNVHTTDFPG  N YSGYDDAWDQDRFEKNFRVD
The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.

Residue conservation: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         SRVVLGEFGVRNVHTTDFPGNYS--GYDDAWDQDRFEKNFRVD

Mouse                         TRVVLGEFGVRNVHTTDFPGNYA--GYDDAWDQNRFEKNFR

Bovine                        TRVVLGEFGVRNVHTTDFPGNYS--GYDDAWDQDRFEKNFR

Slime mold                    TKVTLTNSGVENARGTYYSGAYTSVGYDNSFNLNRFKENFK

Baker's yeast                 --VGIEYNRVTNTTSTDFPGFSK--DAENEWNVEKFKKDFE

Fission yeast                 TEISVLSDRVTDVGSVDFPGYYF--DEDNIWDLDKFKKNLK

Sequence annotation in neighborhood:  
The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.

TypePositionsDescription
Chain 2 – 346 DNA-directed RNA polymerases I and III subunit RPAC1
Beta strand 32 – 35


Literature citations

Recessive mutations in POLR1C cause a leukodystrophy by impairing biogenesis of RNA polymerase III.
Thiffault I.; Wolf N.I.; Forget D.; Guerrero K.; Tran L.T.; Choquet K.; Lavallee-Adam M.; Poitras C.; Brais B.; Yoon G.; Sztriha L.; Webster R.I.; Timmann D.; van de Warrenburg B.P.; Seeger J.; Zimmermann A.; Mate A.; Goizet C.; Fung E.; van der Knaap M.S.; Fribourg S.; Vanderver A.; Simons C.; Taft R.J.; Yates J.R. III; Coulombe B.; Bernard G.;
Nat. Commun. 6:7623-7632(2015)
Cited for: SUBCELLULAR LOCATION; SUBUNIT; FUNCTION; INVOLVEMENT IN HLD11; VARIANTS HLD11 ILE-26; ILE-32; VAL-65; SER-74; ALA-94; HIS-109; ASP-132; ARG-146; GLN-191; THR-262; LYS-295 DEL AND LYS-324; CHARACTERIZATION OF VARIANTS HLD11 ILE-32 AND SER-74; CHARACTERIZATION OF VARIANT TCS3 GLN-279;

Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.