half bridge of mitotic spindle pole body

GO:0061496 · Cytoskeleton · Multiprotein complex · Proposed

Structure adjacent to the plaques of the mitotic spindle pole body. [GO:0061496]

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

Taxonomic distribution

NCBITaxon:4932 Saccharomyces cerevisiae — COMMON: Budding yeast is a characterized fungal model in which mitotic SPB duplication begins at the half-bridge next to the existing spindle pole body. [DOI:10.1146/annurev.cellbio.20.022003.114106]

NCBITaxon:4932 Saccharomyces cerevisiae — Budding-yeast reference system in which half-bridge-linked SPB duplication has been characterized through the mitotic cell cycle. [DOI:10.1146/annurev.cellbio.20.022003.114106]

mitotic spindle pole body duplication site — The mitotic half-bridge next to an existing budding-yeast SPB provides the site where daughter SPB assembly begins.
- DOI:10.1146/annurev.cellbio.20.022003.114106 Jaspersen and Winey 2004 reviewed budding-yeast SPB duplication during mitotic cell-cycle entry as a half-bridge-associated pathway.

The mitotic half bridge is a specialized spindle-pole-body half bridge that marks where a daughter SPB begins to assemble in budding yeast.

Subject	Predicate	Object	Evidence
half bridge of mitotic spindle pole body	is a	half bridge of spindle pole body	`GO:0061496` GO:0061496 is_a GO:0005825 in the Gene Ontology cellular-component hierarchy.
half bridge of mitotic spindle pole body	is part of	mitotic spindle pole body	`GO:0061496` GO:0061496 is defined as adjacent to the plaques of the mitotic spindle pole body.
half bridge of mitotic spindle pole body	templates assembly of	daughter spindle pole body	`DOI:10.1146/annurev.cellbio.20.022003.114106` Jaspersen and Winey 2004 reviewed the half-bridge-associated pathway for budding-yeast SPB duplication.

INTERPRETATION (RESOLVED): Keep the mitotic SPB half bridge narrower than the general SPB half bridge. GO:0061496 denotes the half bridge of the mitotic spindle pole body, is narrower than GO:0005825, and is part of the GO:0044732 mitotic spindle pole body.
CURATION_TODO (OPEN): Resolve exact source-neutral family groundings for mitotic half-bridge constituents. The first GO-backed mitotic half-bridge record captures the cell-cycle-specific substructure without guessing exact InterPro, Pfam, NCBIfam, or Complex Portal groundings for its budding-yeast protein constituents.

GO:0061496 Gene Ontology cellular-component term for the half bridge of the mitotic spindle pole body.
GO:0005825 Gene Ontology parent term for the general half bridge of the spindle pole body.
GO:0044732 Gene Ontology cellular-component term for the mitotic spindle pole body that includes GO:0061496 by parthood.
GO:0005816 Gene Ontology cellular-component term for the broader spindle pole body.
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.

2026-09-29T09:14:08Z codex · CREATED_RECORD — Scaffolded by scripts/new_record.py
2026-09-29T09:15:11Z codex · EXPANDED_RECORD — Added GO-backed half-bridge parentage and mitotic-SPB parthood, Saccharomyces scope, a mitotic duplication-site function, GO and literature evidence, a nonmechanistic mitotic half-bridge topology graph, and boundary/component discussions.