inner plaque of mitotic spindle pole body

GO:0061497 · Cytoskeleton · Multiprotein complex · Proposed

One of three laminate structures that form the mitotic spindle pole body; the inner plaque is in the nucleus. [GO:0061497]

Part of: mitotic spindle pole body (GO:0044732)

Taxonomic distribution

NCBITaxon:4932 Saccharomyces cerevisiae — COMMON: Budding yeast is a characterized fungal model for the nuclear inner plaque of the mitotic spindle pole body. [DOI:10.1146/annurev.cellbio.20.022003.114106]

NCBITaxon:4932 Saccharomyces cerevisiae — Budding-yeast reference system in which the layered mitotic SPB and its nuclear microtubule-nucleating inner plaque have been reviewed. [DOI:10.1146/annurev.cellbio.20.022003.114106]

mitotic nuclear microtubule organization — The mitotic inner plaque is the nuclear face of the budding-yeast SPB that organizes mitotic nuclear microtubule nucleation.
- DOI:10.1146/annurev.cellbio.20.022003.114106 Jaspersen and Winey 2004 reviewed the budding-yeast SPB inner plaque as the nuclear site for microtubule nucleation.

The mitotic inner plaque is a mitosis-specific SPB inner plaque facing the budding-yeast nucleus.

Subject	Predicate	Object	Evidence
inner plaque of mitotic spindle pole body	is a	inner plaque of spindle pole body	`GO:0061497` GO:0061497 is_a GO:0005822 in the Gene Ontology cellular-component hierarchy.
inner plaque of mitotic spindle pole body	is part of	mitotic spindle pole body	`GO:0061497` GO:0061497 defines the inner plaque as one of the laminate structures of the mitotic spindle pole body.
inner plaque of mitotic spindle pole body	organizes	nuclear microtubule	`DOI:10.1146/annurev.cellbio.20.022003.114106` Jaspersen and Winey 2004 reviewed the budding-yeast SPB inner plaque as the nuclear site for microtubule nucleation.

INTERPRETATION (RESOLVED): Keep the mitotic SPB inner plaque narrower than the general SPB inner plaque. GO:0061497 denotes the inner plaque of the mitotic spindle pole body, is narrower than GO:0005822, and is part of the GO:0044732 mitotic spindle pole body.
CURATION_TODO (OPEN): Resolve exact source-neutral family groundings for mitotic inner-plaque constituents. This first GO-backed mitotic inner-plaque record captures the cell-cycle-specific layer without guessing exact InterPro, Pfam, NCBIfam, or Complex Portal groundings for budding-yeast inner-plaque proteins.

GO:0061497 Gene Ontology cellular-component term for the inner plaque of the mitotic spindle pole body.
GO:0005822 Gene Ontology parent term for the general inner plaque of the spindle pole body.
GO:0044732 Gene Ontology cellular-component term for the mitotic spindle pole body that includes GO:0061497 by parthood.
GO:0005880 Gene Ontology cellular-component term for nuclear microtubule, the structure organized by the inner plaque.
DOI:10.1146/annurev.cellbio.20.022003.114106 Jaspersen and Winey 2004, The budding yeast spindle pole body: structure, duplication, and function, Annual Review of Cell and Developmental Biology.

2026-09-29T15:16:04Z codex · CREATED_RECORD — Scaffolded by scripts/new_record.py
2026-09-29T15:16:47Z codex · EXPANDED_RECORD — Added GO-backed inner-plaque parentage and mitotic-SPB parthood, Saccharomyces scope, a mitotic nuclear microtubule-organization function, GO and literature evidence, a nonmechanistic mitotic inner-plaque topology graph, and boundary/component discussions.