Your Query returns 17 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Psmc1NM_00894710090S4    P26s4    602706
Psmc1NW_04776210116
PSMC1BC0163689606P26S4    S4    p56    MGC24583    MGC8541    602706
PSMC1BC0005129606P26S4    S4    p56    MGC24583    MGC8541    602706
PSMC1AY4098489606602706
PSMC1AY4098499598
PSMC1AY40985010090602706
PSMC1AF4012139606S4    602706
PSMC1NM_0028029606S4    p56    P26S4    MGC8541    MGC24583    602706
Psmc1NT_03955210090602706
Psmc1BC06315710116s4   
Psmc1BC00386010090P26s4    S4    602706
PSMC1NT_0264379606602706
Psmc1NM_05712310116s4   
psmc1NM_2000337955fb05d04    zgc:56516   
psmc1BC0494717955fb05d04    zgc:56516   
PSMC1BC0677419606P26S4    S4    p56    MGC24583    MGC8541    602706

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002