• Immunofluorescence of the SMN protein
Chair of Biochemistry

Publications (complete list)




Original Manuscripts


Dill H, Linder B, Fehr A und Fischer U (2012): Intronic miR-26b controls neuronal differentiation by repressing its host transcript, ctdsp2. Genes Dev 26(1): 25-30.


Linder B, Dill H, Hirmer A, Brocher J, Lee GP, Mathavan S, Bolz HJ, Winkler C, Laggerbauer B and Fischer U (2011): Systemic splicing factor deficiency causes tissue-specific defects: a zebrafish model for retinitis pigmentosa. Hum Mol Genet 20(2): 368-77.

Guderian G, Peter C, Wiesner J, Sickmann A, Schulze-Osthoff K, Fischer U and Grimmler M (2010): RioK1, a new interactor of protein arginine methyltransferase 5 (PRMT5), competes with pICln or binding and modulates PRMT5 complex composition and substrate specificity. J Biol Chem 286(3): 1976-86.

Grimm C, Chari A, Reuter K and Fischer U (2010): A crystallization screen based on alternative polymeric precipitants. Acta Crystallogr D Biol Crystallogr. 66: 685-697.

Schäffler K, Schulz K, Hirmer A, Wiesner J, Grimm M, Sickmann A and Fischer U (2010): A stimulatory role for the La-related protein 4B in translation. RNA 16: 1488-99.

Martin G, Ostareck-Lederer A, Chari A, Neuenkirchen N, Dettwiler S, Blank D, Rüegsegger U, Fischer U and Keller W (2010):

Arginine methylation in subunits of mammalian pre-mRNA cleavage factor I

. RNA 16: 1646-59.


Galao RP*, Chari A*, Alves-Rodriguez I, Lobao D, Mas A, Kambach C, Fischer U and Diez J (2010):

LSm1-7 complexes bind to specific sites in viral RNA genomes and regulate their translation and replication

. RNA 16: 817-827.
*these authors contributed equally to this work

Kroiss M, Brünger KM, Wiesner J, Grimmler M, Sickmann A and Fischer U (2009): Native purification of protein and RNA-protein complexes using a novel affinity procedure. Fly 3(3): 221-8.


Scheller N, Mina LB, Galão RP, Chari A, Giménez-Barcons M, Noueiry A, Fischer U, Meyerhans A and Diez J (2009): Translation and replication of hepatitis C virus genomic RNA depends on ancient cellular proteins that control mRNA fates. Proc Natl Acad Sci USA 106(32): 13517-22.

Guenther UP, Handoko L, Laggerbauer B, Jablonka S, Chari A, Alzheimer M, Ohmer J, Plöttner O, Gehring N, Sickmann A, von Au K, Schuelke M and Fischer U (2009):

IGHMBP2 is a ribosome-associated helicase inactive in the neuromuscular disorder distal SMA type 1 (DSMA1)

. Hum Mol Genet 18(7): 1288-300.


Chari A, Golas M, Neuenkirchen N, Klingenhäger M, Sander B, Englbrecht C, Sickmann A, Stark H and Fischer U (2008):

An assembly chaperone collaborates with the SMN complex to generate spliceosomal SnRNPs

. Cell 135: 497-509.


Linder B, Plöttner O, Kroiss M, Hartmann E, Laggerbauer B, Meister G and Fischer U (2008):

TDRD3 is a novel stress granule-associated protein ineracting with the Fragile-X syndrome protein FMRP

. Hum Mol Genet 17: 3236-46.


Kroiss M, Schultz J, Wiesner J, Chari A, Sickmann A and Fischer U (2008):

Evolution of an RNP assembly system: a minimal SMN-complex facilitates formation of U snRNPs in Drosophila melanogaster

. Proc Nat Acad Sci USA 105: 10045-10050.


Markert A, Grimm M, Martinez, J, Wiesner J, Meyerhans A, Meyuhas O, Sickmann A and Fischer U (2008):

The La-related protein, Larp7, is a component of the 7SK snRNP and affects Tat-dependent transcription of HIV-1

. EMBOrep 9: 569-575.


Petri S, Grimmler M, Over S, Fischer U and Gruss O (2007):

Dephosphorylation of survival motor neurons (SMN) by PPM1G/PP2Cgamma governs Cajal body localization and stability of the SMN-complex

. J Cell Biol 179: 451-465.


Menzel N, Chari A, Fischer U, Linder M and Raabe T (2007):

A 5’-fluorosulfonylbenzoyladenosine-based method to identify physiological substrates of a Drosophila p21-activated kinase

.  Anal Biochem 368: 178-184.

Otter S, Grimmler M, Neuenkirchen N, Chari A, Sickmann A and Fischer U (2007):

A comprehensive interaction map of the human survival of motor neuron (SMN) complex

. J Biol Chem 282: 5825-5833.


Grimmler M, Otter S, Peter C, Müller F, Chari A and Fischer U (2005):

Unrip, a factor implicated in cap-independent translation, associates with the cytosolic SMN complex and influences its intracellular localization

. Hum Mol Genet 14: 3099-3111.

Azzouz TN, Pillai RS, Dapp C, Chari A, Meister G, Kambach C, Fischer U and Schumperli D (2005):

Towards an assembly line for U7 snRNPs: interactions of U7-specific Lsm proteins with PRMT5 and SMN complexes

. J Biol Chem 280: 34435-34440.

Winkler C, Eggert C, Gradl D, Meister G, Giegerich M, Wedlich D and Fischer U (2005): Reduced RNP assembly causes motor axon degeneration in an animal model for spinal muscular atrophy. Genes&Dev 19: 2320-2330.


Grimmler M, Martin L, Nousiainen M, Koerner R, Meister G and Fischer U (2005):

Phosphorylation regulates the activity of the SMN-complex during assembly of spliceosomal U snRNPs

. EMBOrep 6: 70-76.

Grohmann K, Rossoll W, Kobsar I, Holtmann B, Jablonka S, Stoltenberg-Didinger G, Hübner C, Fischer U, Martini R and Sendtner M (2004): Characterization of Ighmbp2 in motor neurons and implications for the pathomechanism in a mouse model for human spinal muscular atrophy with respiratory distress type 1 (SMARD1). Hum Mol Genet 15: 2031-2042.


Sun Y, Grimmler M, Schwarzer V, Schoenen F, Fischer U and Wirth B (2004):

Molecular and functional analysis of intragenic SMN1 mutations in patients with spinal muscular atrophy

. Hum Mutations 25: 64-71.


Schwappach P and Grimm M (2004): Studies into incidence of Eutypiose and detection of Eutypa lata in grapevine. Int Vine Magazine 3: 46-49.


Malatesta M, Scassellati C, Meister G, Plöttner O, Bühler D, Sowa G, Martin TE, Keidel E, Fischer U and S Fakan (2004): Ultrastructural characterisation of a nuclear domain highly enriched in survival of motor neuron (SMN) protein. Exp Cell Res 292 (2): 312-321.

Pillai R, Grimmler M, Meister G, Will CL, Lührmann R, Fischer U and Schümperli D (2003):

Unique Sm core structure of U7 snRNPs: assembly by a specialized SMN-complex and role of a new component, Lsm11, in histone RNA processing

. Genes&Dev 17: 2321-2333.

Barth M, Meister G, Fischer U and Grässer F (2003): Epstein-Barr virus nuclear antigen 2 binds via its methylated arginine-glycine repeat to the survival motor neuron protein. J Virol 77: 5008-5014.

Meister G and Fischer U (2002): Assisted RNP assembly: SMN- and PRMT5-complexes cooperate in the formation of spliceosomal U snRNPs. EMBO J 21: 5853-5863.


Jablonka S, Holtmann B, Meister G, Bandilla M, Russoll W, Fischer U and Sendtner M (2002): Gene targeting of Gemin2 in mice reveals a correlation between defects in the biogenesis of U snRNPs and motor neuron cell death. Proc Natl Acad Sci USA 99: 10126-10131.

Yukawa Y, Matousek J, Grimm M, Vrba L, Steger G, Sugiura M and Beier, H (2002):

Plant 7SL RNA and tRNA(Tyr) genes with inserted antisense sequences are efficiently expressed in an in vitro transcription system from Nicotiana tabacum cells

. Plant  Mol Biol 50: 713-23.


Meister G, Eggert C, Bühler D, Brahms H, Kambach C and Fischer U (2001):

Methylation of Sm proteins and regulation of U snRNP assembly by a complex containing PRMT5 and pICln

. Current Biol 11: 1990-1994.

Brahms H, Meheus L, de Brabandere V, Fischer U and Lührmann R (2001): Symmetrical dimethylation of arginine residues in spliceosomal Sm protein B/B‘ and the Sm-like protein LSm4, and their interaction with the SMN protein. RNA 7(11): 1531-42.

Jones KW, Gorzynski K, Hales CM, Fischer U, Badbanchi F, Terns RM and Terns MP (2001): Direct interaction of the spinal muscular atrophy disease protein SMN with the core snoRNP protein fibrillarin. J Biol Chem 276(42): 38645-51.

Meister G, Bühler D, Pillai R, Lottspeich F and Fischer U (2001):

A multiprotein complex mediates the ATP-dependent assembly of spliceosomal U snRNPs.

Nat Cell Biol 3: 945-949.

Jablonka S, Bandilla M, Wiese S, Bühler D, Wirth B, Sendtner M and Fischer U (2001): Co-regulation of survival of motor neuron (SMN) protein and its interactor SIP1 during development and in spinal muscular atrophy. Hum Molec Genetics 10: 497-505.

Laggerbauer B, Ostareck D, Keidel E-M, Ostareck-Lederer A and Fischer U (2001):

Evidence that fragile X mental retardation protein is a negative regulator of translation

. Hum Molec Genetics 10: 329-338.


Meister G, Hannus S, Plöttner O, Laggerbauer B, Baars T, Hartmann E, Fakan S and Fischer U (2001): SMNrp is an essential pre-mRNA splicing factor required for the formation of the mature spliceosome. EMBO J 20: 2304-2314.


Beier H and Grimm M (2001):

Misreading of termination codons in eukaryotes by natural suppressor tRNAs

. Nucleic Acids Res 29: 4767-82.


Meister G, Bühler D, Laggerbauer B, Zobawa M, Lottspeich F and Fischer U (2000): Characterization of a nuclear 20S complex containing the survival of motor neurons (SMN) protein and a specific subset of spliceosomal Sm proteins. Hum Molec Genetics 9: 1977-1986.


Selenko P, Sprangers O, Stier R, Bühler,G, Fischer U and Sattler M (2001): Structure and Sm protein interaction of the SMN Tudor domain. Nat Struct Biol 8: 27-31.

Hannus S, Seraphin B and Fischer U (2000): The Schizosaccharomyces pombe protein Yab8p and a novel factor, Yip1p, share structural and functional similarity with the Spinal Muscular Atrophy-associated proteins SMN and SIP1. Hum Molec Genetics 9: 663-674.

Bühler D, Raker V, Lührmann R and Fischer U (1999): Essential role for the Tudor domain of SMN in U snRNP assembly: implications for Spinal Muscular Atrophy. Hum Molec Genetics 8: 2351-2357.


Fischer U, Lührmann R, Dreyfuss G and Malim MH (1999):

HIV-1 Rev accesses a non-mRNA export pathway that overrides nuclear retention of RNA

. Nucleic Acids Res 27: 4128-4134.


Filali M, Qiu J, Awasthi S, Fischer U, Monos D and Kamoun M (1999): Monoclonal antibody specific to a subclass of polyproline-Arg motif provides evidence for the presence of an snRNA-free spliceosomal Sm protein complex in vivo: implications for molecular interactions involving proline-rich sequences of Sm B/B' proteins. J Cell Biochem 74: 168-180.

Malatesta M, Fakan S and Fischer U (1999):

The Sm core domain mediates targeting of U1 snRNP in subnuclear compartments involved in transcription and splicing

. Exp Cell Res 249: 189-198.

Fouchier RAM, Meyer BE, Simon, JHM, Fischer U, Albright AV, Gonzales-Scavano F and Malim MH (1998): Interaction of HIV-1 Vpr with the nuclear pore complex. J Virol 72: 6004-6013.

Grimm M, Brünen-Nieweler C, Junker V, Heckmann K and Beier H (1998):

The hypotrichous ciliate Euplotes octocarinatus has only one type of tRNA(Cys) with GCA anticodon encoded on a single macronuclear DNA molecule

. Nucleic Acids Res 26: 4557-65.

Grimm M, Nass A, Schüll C and Beier H (1998):

Nucleotide sequences and functional characterization of two tobacco UAG suppressor tRNA(Gln) isoacceptors and their genes

. Plant Mol Biol 38: 689-97.

Fouchier RAM, Meyer BE, Simon JHM, Fischer U and Malim MH (1997): HIV-1 infection in non-dividing cells: evidence that the viral matrix protein is important for Gag processing but not for post-entry nuclear import. EMBO J 16: 4531-4539.

Lui Q, Fischer U and Dreyfuss G (1997): The spinal muscular atrophy disease gene product, SMN, and its associated protein SIP1 are in a complex with spliceosomal snRNP proteins. Cell 90: 1013-1021.

Fischer U, Lui Q and Dreyfuss G (1997): The SMN-SIP1 complex has an essential role in spliceosomal U snRNP biogenesis. Cell 90: 1023-1029.

Izaurralde E, Jarmolowski A, Beisel C, Mattaj IW, Dreyfuss G and Fischer U (1996): A role for the hnRNP A1 M9-transport signal in mRNA nuclear export. J Cell Biol 137: 27-35.


Sekine M, Kadokura M, Satoh T, Seio K, Wada T, Fischer U, Sumpter V and Lührmann R (1996): Chemical synthesis of a 5’-terminal TMG-capped ribonucleotide m32,2,7G5'pppAmpUmpA of U1 RNA. J Organic Chemistry 61: 4412-4422.

Fridell R, Fischer U, Lührmann R, Meyer BE, Meinkoth JL, Malim MH and Cullen BR (1996): Amphibian transcription factor IIIA proteins contain a sequence functionally equivalent to the nuclear export signal of human immunodeficiency virus type 1 Rev. Proc Natl Acad Sci USA 93: 2936-2940.


Fischer U, Huber J, Boelens W, Mattaj IW and Lührmann R (1995): The HIV-1 Rev activation domain is a nuclear export signal that accesses an export pathway used by specific cellular RNAs. Cell 82: 475-483.


Sekine M, Kadolura M, Satoh T, Seio K, Wada T, Fischer U and Lührmann R (1994): Chemical synthesis of the 5´-terminal structure of U1 RNA. Nucl Acid Symp Series 31: 61-62.


Kammerloher W, Fischer U, Piechottka GP and Schäffner AR (1994): Water channels in the plant plasma membrane cloned by immunoselection from a mammalian expression system. The Plant J 6: 187-199.

Plessel G, Fischer U and Lührmann R (1994): m3G-cap hypermethylation of U1 small nuclear ribonucleoprotein (snRNP) in vitro: evidence that the U1 mall nuclear RNA-(Guanosine-N2)-methyltransferase is a non-snRNP cytoplasmic protein that requires a binding site on the Sm core domain. Mol Cell Biol 14: 4160-4172.


Fischer U, Meyer S, Teufel M, Heckel C, Lührmann R and Rautmann G (1994): Evidence that HIV-1 Rev directly promotes nuclear export of unspliced RNA. EMBO J 13: 4105-4112.


Hackl W, Fischer U and Lührmann R (1994): A 69-kD protein that associates reversibly with the Sm core domain of several spliceosomal snRNP species. J Cell Biol 124: 261-272.


Fischer U, Heinrich J, van Zee K, Fanning E and Lührmann R (1994): Nuclear transport of U1 snRNP in somatic cells: differences in signal requirement compared with Xenopus laevis oocytes. J Cell Biol 125: 971-980.


van Zee K, Dickmanns A, Fischer U, Lührmann R and Fanning E (1993): A cytoplasmically anchored nuclear protein interferes specifically with the import of nuclear proteins but not U1 snRNA. J Cell Biol 121: 229-240.

Fischer U, Sumpter V, Sekine M, Satoh T and Lührmann R (1992): Nucleo-cytoplasmic transport of U snRNPs: Definition of a nuclear location signal in the Sm core domain that binds a transport receptor independently of the m3G cap. EMBO J 12: 573-583.

Sumpter V, Kahrs A, Fischer U, Kornstädt U and Lührmann R (1992): In vitro reconstitution of U1 and U2 snRNPs from isolated proteins and snRNA. Mol Biol Report 16: 229-240.


Fischer U, Darzynkiewicz E, Tahara SM, Dathan NA, Lührmann R and Mattaj IW (1991):

Diversity in the signals required for nuclear accumulation of U snRNPs and variety in the pathways of nuclear transport

. J Cell Biol 113: 705-714.


Fischer U and Lührmann R (1990): An essential signalling role for the m3G cap in the transport of U1 snRNP to the nucleus. Science 249: 786-790.


Hornig H, Fischer U, Costas M, Rauh A and Lührmann R (1989): Analysis of genomic clones of the murine U1 RNA-associated 70-KDa proteins reveals a high evolutionary conservation of the protein between human and mouse. Eur J Biochem 182: 45-50.










Reviews and Book Chapter

Fischer U, Englbrecht C and Chari A (2011): Biogenesis of ribonucleoprotein particles involved in mRNA maturation. Wiley Interdisciplinary Reviews: RNA.

Chari A and Fischer U (2010):

Cellular strategies for the assembly of molecular machines

. Trends Biochem Sci 35: 676-683.

Chari A and Fischer U (2009):

Molekulares Bodybuilding: Wie Zellen RNA-Proteinkomplexe herstellen

. Biospektrum 15. Jahrgang, Ausgabe 05/09.

Chari A, Paknia E and Fischer U (2009):

The role of RNP biogenesis in Spinal Muscular Atrophy

. Curr Opin Cell Biol 21: 387-393.

Kroiss M, Fischer U and Schultz J (2009): When one plus one equals three: Biochemistry and bioinformatics combine to answer complex questions. Fly 3: 212-214.

Neuenkirchen N, Chari A and Fischer U (2008):

Deciphering the assembly pathway of Sm-class U snRNPs

. FEBS Lett 582: 1997-2003.


Fischer U, Kroiss M and Chari A (2007): 

Wenn Muskeln die Nerven verlieren

. Biospektrum 13. Jahrgang, Ausgabe 06/07.

Eggert C, Chari A, Laggerbauer B and Fischer U (2006):

Spinal muscular atrophy: the RNP connection

. Trends Mol Med 12: 113-121.

Eggert C and Fischer U (2003): Der Spinalen Muskelatrophie auf der Spur. Bioforum 11/2003.

Eggert C and Fischer U (2003): RNA-Interferenz: ein neues Werkzeug zur Analyse der Genfunktion. Biospektrum 9. Jahrgang, Ausgabe 04/03.

Meister G, Eggert C and Fischer U (2002): SMN-mediated assembly of RNPs: a complex story. Trends in Cell Biol. 12: 1-7.

Fischer U, Hannus S and Plöttner O (1999): Searching for the cause of spinal muscular atrophy. Innovation 7: 4-6.

Nakielny S, Fischer U, Michael WM and Dreyfuss G (1997):


. Annu Rev Neurosci 20: 269-301.

Liu Q, Siomi H, Siomi MC, Fischer U, Zhang Y, Wan L and Dreyfuss G (1996): Molecular characterization of the protein products of the Fragile X Syndrome gene and the Survival of Motor Neurons gene. Cold Spring Harbor Symp Quant Biol 61: 689-697.


Fischer U, Michael WM, Lührmann R and Dreyfuss G (1996): Signal-mediated nuclear export pathways of proteins and RNAs.Trends in Cell Biol 6: 290-293.