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Strain Name:
B6.129(Cg)-Actg1tm1.1Erv/Mmmh
Stock Number:
075883-MU
Citation ID:
RRID:MMRRC_075883-MU
Other Names:
Actg1 +/-

Strain Information

QUALITY CONTROL OF B6.129(Cg)-Actg1tm1.1Erv/Mmmh  |  University of Missouri
Last Updated:
Strain Data and Information Information by Submitter Assessed by MMRRC1,2
Published Provided
Allele-specific genotype3YES
Genetic backgroundYES
Viability of genotypes available for distributionYES
Specific Pathogen- Status YES
Recoverability of cryopreserved sperm/embryos4 YES
Gene or allele sequence3 n.d.
Gene or allele expression3n.d.
Gene or allele function3n.d.
Observable and/or measurable phenotypesn.d.
Fertility of genotypes available for distribution YES
Fecundity/breeding performance n.d.

1 When indicated as verified ("YES"), then please note that information presented is to the best of our knowledge correct and up-to-date at the time of verification at the MMRRC Distribution Center; however, this information is subject to change due to breeding, maintenance, and other actions on the mouse strain at the MMRRC Distribution Center; direct any questions on this table to the MMRRC Distribution Center for this mouse stain.

2 If verification has not been performed (as indicated by "NO"), investigators may request specific verification testing for a fee. Requests should be submitted directly to the MMRRC Distribution Center assigned to the management, archiving, and distribution of the strain. A full listing of available testing and analytical services is available at https://www.mmrrc.org/about/services.php.

3 This information may or may not apply to each individual engineered allele (e.g., Cre, FlpO) present in the strain.

4 Recovery refers to thawing, in vitro fertilization (IVF), and/or embryo culture leading to live offspring.

Actg1tm1.1Erv
Name: actin, gamma, cytoplasmic 1; targeted mutation 1.1, James M Ervasti
Type: Allele
Species: Mus musculus (mouse)
Chromosome: 11
Alteration at locus: Knockout
Actg1
Name: actin, gamma, cytoplasmic 1
Synonyms: E51, Actl
Type: Gene
Species: Mouse
Chromosome: 11
Alteration at locus: Knockout
NCBI: 11465
HGNC: HGNC:144
Homologene: 74402
Genetic Alterations
Germ line, cre-mediated recombination removed exon 2 and 3 of the Actg1 gene.
The absence of protein product was confirmed by western blot analysis on cochlear, brain, kidney, and lung extracts
ES Cell Line
R1
Phenotype
  • Gammacyto-actin null mice (Actg1−/−): viable, however, mice have increased mortality and show progressive hearing loss during adulthood despite compensatory up-regulation of Betacyto-actin
    • up to 6 weeks of age: near-normal auditory brainstem response (ABR) thresholds
    • 16-weeks of age: demonstrated a marked hearing impairment at each frequency tested
    • 24 weeks of age: profoundly deaf
    • some mice: premature lethality of unknown causes
    • although surviving mice appeared largely normal, their body weight was ≈20% lower than wild-type and heterozygous littermates
  • Heterozygous mice (Actg1+/−): despite expressing only 50% of wild-type levels of gammacyto-actin, exhibited wild-type ABR thresholds up to 24 weeks of age
  • Devoid of gammacyto-actin mice: viable, however, mice were born at one-third of the expected Mendelian ratio, indicating that the absence of gammacyto-actin caused some embryonic or perinatal lethality
Strain GQC Summary
Gene Specific Genotyping:

To request gene-specific and other genotyping services for a strain, please contact the distribution MMRRC Center for more information.

Background Genetic Quality:

The MMRRC has developed a Genetic Quality Control pipeline using the MiniMUGA array to provide additional information to identify and validate genetic backgrounds of MMRRC strains. For more information on whether genetic background data is available, please contact MMRRC_GeneticQC@med.unc.edu. Note: that MiniMUGA genetic background data is not available on all strains, but can be ordered if desired.

Suggested Control Mice
Littermates of all relevant genotypes.
  • Cell Biology
  • Developmental Biology
  • Models for Human Disease
Donor
James Ervasti, Ph.D., University of Minnesota Medical School.
Primary Reference

Belyantseva IA, Perrin BJ, Sonnemann KJ, Zhu M, Stepanyan R, McGee J, Frolenkov GI, Walsh EJ, Friderici KH, Friedman TB, Ervasti JM. Gamma-actin is required for cytoskeletal maintenance but not development. Proc Natl Acad Sci U S A. 2009 Jun 16;106(24):9703-8. doi: 10.1073/pnas.0900221106. Epub 2009 Jun 3. (Medline PMCID: 2701000)

Additional References

Sonnemann KJ, Fitzsimons DP, Patel JR, Liu Y, Schneider MF, Moss RL, Ervasti JM. Cytoplasmic gamma-actin is not required for skeletal muscle development but its absence leads to a progressive myopathy. Dev Cell. 2006 Sep;11(3):387-97. doi: 10.1016/j.devcel.2006.07.001. (Medline PMID: 16950128)

Strain Development
A 12 kb mouse genomic clone of the Actg1 locus (gammacyto-actin) was used to assemble a floxed Actg1 construct (pKO-ScAB). This construct was linearized and electroporated into R1 embryonic stem cells. Correctly targeted clones were identified by Southern blot, karyotyped, and injected iinto C57BL/6 blastocysts. Resulting chimeric males were bred to C57BL/6 females to establish germline transmission. Agouti offspring heterozygous for the floxed Actg1 allele were bred with HSA-Cre mice (human skeletal alpha-actin promoter driven Cre) to generate muscle-specific Actg1 knockouts. Actg1flox+neo/+ mice were then bred to Actg1flox+neo/+ mice to obtain homozygous floxed mice carrying the cre transgene (Actg1flox+neo/flox+neoHSA-Cre).

Actg1flox+neo/+ mice were also bred with Ella-Cre mice in order to selectively remove the neomycin cassette from the floxed allele in the germline. F1 males were mated with C57BL/6 females to screen for partial recombination between loxP sites “A” and “B.” Subsequent Actg1flox/+ mice were backcrossed two generations to C57BL/6 mice and then bred to homozygosity with HSA-Cre as above.

Actg1+/− mice were backcrossed to C57BL/6 for 10 generations.
Actg1+/− X Actg1+/− breedings were arranged to obtain Actg1−/− mice.


Disclaimer: If MMRRC Strain Genetic Quality Control (GQC; based on MiniMUGA genotyping and analysis) has been completed for this strain, the information might differ from the genetic background information provided by the submitter. MiniMUGA genetic analysis is done on a strain’s tissue samples taken when archived by or ordered from the assigned MMRRC Center.

Colony and Husbandry Information

Colony Surveillance Program and Current Health Reports

Mice recovered from a cryo-archive will have health surveillance performed on recipient females. Health reports will be provided prior to shipment. If you require additional health status information, please email mmrrc@missouri.edu.
Coat Color
Black
Eye
Black
MMRRC Breeding System
Backcross
Breeding Scheme(s)
C57BL/6J
Generation
N > 10
Overall Breeding Performance
Good
Viability and Fertility: Female Male Comments
Homozygotes are viable: Reduced Reduced
Homozygotes are fertile: Reduced Reduced
Heterozygotes are fertile: Yes Yes
Age Reproductive Decline: Undetermined Undetermined
Average litter size
4 to 6
Recommended wean age
3 Weeks
Average Pups Weaned
Less than 4

Order Information

Limited quantities of breeder mice (recovered litter) are available from a cryoarchive; recovered litter usually available to ship in 3 to 4 months.

Cryopreserved material may be available upon request, please inquire to mmrrc@missouri.edu for more information.

A Commercial License Agreement from the Donor is required for for-profit entities to use this strain. For more information, please contact Naomi Walsh.

Distribution of this strain requires submission of the MMRRC Conditions of Use (COU). A link to the COU web form will be provided via email after an order has been placed; the form should be completed then or the email forwarded to your institutional official for completion.

A Commercial License Agreement from the Donor is required for for-profit entities to use this strain. For more information, please contact Naomi Walsh

Additional charges may apply for any special requests. Shipping costs are in addition to the basic distribution/resuscitation fees. Information on shipping costs and any additional charges will be provided by the supplying MMRRC facility.

Click button to Request this one strain. (Use the MMRRC Catalog Search to request more than one strain.)
MMRRC Item # Description Distribution Fee / Unit (US $)
*Shipping & Handling not included*
Units Notes
075883-MU-SPERM Cryo-preserved spermatozoa $437.00 / $817.00
Non-Profit / For-Profit
Aliquot Approximate quantity3
075883-MU-RESUS Litter recovered from cryo-archive $2,624.00 / $5,340.00
Non-Profit / For-Profit
Litter Recovered litter4; additional fees for any special requests.
Cryopreserved material may be available upon request, please inquire to mmrrc@missouri.edu for more information.

Some MMRRC strains were submitted by the donor as cryopreserved germplasm, and because these strains were not cryopreserved by the MMRRC, we have not assessed the quality, nor genotype, of this material. Our expertise in reviving mice from various qualities of frozen sperm and embryos, using methods like IVF and ICSI, gives us confidence in successful recoveries in most cases. However, due to the uncertain quality of these samples, we'll limit revival attempts to two per order. Additional attempts are available for a fee, on top of standard charges, if requested. It's important to note that some strains may lack the expected mutation, so we can't assure successful order fulfillment until we attempt to revive the strain.

1 The distribution fee covers the expense of rederiving mice from a live mouse; you will receive the resulting litter. The litter will contain at minimum one mutant carrier; the actual number of animals and the gender and genotype ratios will vary. (Typically, multiple breeder pairs can be established from the recovered litter.) Prior to shipment, the MMRRC will provide information about the animals recovered. If you anticipate or find that you need to request specific genotypes, genders or quantities of mice in excess of what is likely from a resuscitated litter, you may discuss available options and pricing with the supplying MMRRC facility.

2 An aliquot contains a sufficient number of embryos (in one or more vials or straws and based on the transfer success rate of the MMRRC facility) to transfer into one to three recipients. The MMRRC makes no guarantee concerning embryo transfer success experienced in the recipient investigator's laboratory. Neither gender nor genotype ratios are guaranteed.

3 An aliquot is one straw or vial with sufficient sperm to recover at least one litter of mice, as per provided protocols, when performed at the MMRRC facility. The MMRRC makes no guarantee concerning the success of these procedures when performed outside the MMRRC facilities.

4 The distribution fee covers the expense of resuscitating mice from the cryo-archive; you will receive the resulting litter. The litter will contain at minimum one mutant carrier; the actual number of animals and the gender and genotype ratios will vary. (Typically, multiple breeder pairs can be established from the recovered litter.) Prior to shipment, the MMRRC will provide information about the animals recovered. If you anticipate or find that you need to request specific genotypes, genders or quantities of mice in excess of what is likely from a resuscitated litter, you may discuss available options and pricing with the supplying MMRRC facility.

To request material from the MMRRC: Please fill out our on-line request form (accessible from the catalog search results page, or click the Request this Strain button in the fees section). If you have questions or need assistance completing this form, you may call Customer Service at (800) 910-2291 (in USA or Canada) or (530) 757-5710 (international calls). Before you call, please have with you: the MMRRC item number, quantity needed, Bill-to and Ship-to contact information.