Review started from just fetch-gene human ADRM1 for the Proteostasis PN batch. Falcon
deep research was requested with just deep-research-falcon human ADRM1 --fallback
perplexity-lite. Falcon timed out after 600 seconds, and the perplexity-lite fallback
failed with a Perplexity API 401 quota error. Because no provider file was produced, the
supporting synthesis was recorded in ADRM1-deep-research-manual.md.
ADRM1 encodes the human Rpn13 proteasomal ubiquitin receptor. Qiu et al. report that
"we discovered a novel 46-kDa (407 residues) subunit of its 19S regulatory complex"
and that "The C-terminal half of hRpn13 binds directly to the proteasome-associated
deubiquitinating enzyme, UCH37, and enhances its isopeptidase activity" PMID:17139257. Hamazaki et al. similarly describe "the identification of Adrm1 as a
novel proteasome interacting protein in mammalian cells" and report that "hRpn13
recruits UCH37, a deubiquitinating enzyme known to associate with 26 proteasomes"
PMID:16990800.
The direct molecular function should be captured with specific terms, not generic protein
binding. Husnjak et al. report that "Rpn13 binds ubiquitin through a conserved
amino-terminal region termed the pleckstrin-like receptor for ubiquitin (Pru) domain"
PMID:18497817. Chen et al.
state that "Rpn13 is a subunit of the proteasome that serves as a receptor for both
ubiquitin and Uch37" and that hRpn2/S1 binding activates hRpn13 for ubiquitin binding
PMID:20471946. Therefore, GO:0005515 protein binding rows should be
modified or marked over-annotated in favor of ubiquitin binding, proteasome binding, and
ubiquitin-specific protease binding/deubiquitinase activator functions.
PN projection assessment: ADRM1 is projected to GO:0000502 proteasome complex,
GO:0005838 proteasome regulatory particle, and GO:0008540 proteasome regulatory
particle, base subcomplex from the ubiquitin-proteasome-system PN categories. The broad
proteasome complex term is already in GOA and is acceptable. The regulatory-particle term
is entailed by existing proteasome/regulatory-particle evidence and is safe. The base
subcomplex projection is also supported: a structural review states that recognition of a
ubiquitylated substrate is mediated by "ubiquitin receptors Rpn10 and Rpn13, the base
subunits within the holoenzyme" PMID:29636472. This argues that the existing IBA annotation to GO:0008541 proteasome
regulatory particle, lid subcomplex should be modified to GO:0008540 rather than retained.
The broad process annotations should be handled conservatively. ADRM1 directly contributes
to proteasome-mediated ubiquitin-dependent protein catabolism: Qiu et al. report that
"Knockdown of hRpn13 in 293T cells increases the cellular levels of ubiquitin conjugates
and decreases the degradation of short-lived proteins" PMID:17139257, and Chen et al.
show that reconstituted hRpn13 stimulates degradation of ubiquitinated cyclin B
PMID:20471946. However, the oxidative-stress, type-I-interferon, synaptic-vesicle, and
RNA polymerase II transcription-elongation annotations are not direct ADRM1 core
functions based on the cached text. The transcription-elongation paper is cached only as
partial/abstract text and discusses human Elongator rather than ADRM1, so that annotation
is left undecided pending accessible full text PMID:11818576.
Annotation stance: