Respiratory chain and ATP synthase assembly factors in Drosophila melanogaster

The complexes of the mitochondrial oxidative phosphorylation system are built from nuclear- and mitochondrially encoded subunits with the help of dedicated assembly factors that are not part of the mature enzymes. Complex II (succinate dehydrogenase) assembly factors include SDHAF2-type proteins required for covalent flavinylation of the SdhA subunit and SDHAF3 and SDHAF4 homologs that protect the iron-sulfur subunit and intermediates. Complex III assembly requires the AAA ATPase Bcs1, which inserts the Rieske iron-sulfur protein, the LYR protein LYRM7 that chaperones it, and the UQCC proteins that support cytochrome b. HIG1 domain proteins associate with complexes III and IV and support respiratory supercomplex formation. ATP synthase (complex V) assembly factors include ATPAF1-type chaperones of the F1 domain, TMEM70 and the metalloprotease ATP23.

MODULE:dmel_respiratory_complex_assembly_factorsDRAFTCONCRETEBiological Processmodules/dmel_respiratory_complex_assembly_factors.yaml
mitochondrial respiratory chain complex assemblyGO:0033108
FB:FBgg0002034
FlyBase gene group MCIII-AF: Mitochondrial respiratory chain complex iii assembly factors
FlyBase release FB2026_03 groups 9 D. melanogaster genes as mitochondrial respiratory chain complex iii assembly factors (MCIII-AF); this module models that group.
FB:FBgg0002036
FlyBase gene group MCR-AF: Mitochondrial respirasome assembly factors
FlyBase release FB2026_03 groups 4 D. melanogaster genes as mitochondrial respirasome assembly factors (MCR-AF); this module models that group.
FB:FBgg0002037
FlyBase gene group MCII-AF: Mitochondrial respiratory chain complex ii assembly factors
FlyBase release FB2026_03 groups 5 D. melanogaster genes as mitochondrial respiratory chain complex ii assembly factors (MCII-AF); this module models that group.
FB:FBgg0002039
FlyBase gene group MCV-AF: Mitochondrial proton-transporting atp synthase complex assembly factors
FlyBase release FB2026_03 groups 6 D. melanogaster genes as mitochondrial proton-transporting atp synthase complex assembly factors (MCV-AF); this module models that group.
GO:0033108
mitochondrial respiratory chain complex assembly
GO term grounding the module as mitochondrial respiratory chain complex assembly.

The module groups four FlyBase assembly-factor sets; the factors act on different complexes and are not a single complex or a linear pathway, so no connections are asserted. Complex I and complex IV assembly factors are not in these FlyBase groups and are outside this module. Several members are uncharacterised in Drosophila (for example CG15386, CG30373, CG17734 and CG12107) and are included on the strength of FlyBase group membership and orthology; process terms are applied at the level of each group and do not imply that each member has been tested. Molecular functions are left unset because they are not established for the Drosophila proteins. FlyBase groups realized by this module: MCIII-AF (FBgg0002034), MCR-AF (FBgg0002036), MCII-AF (FBgg0002037), MCV-AF (FBgg0002039). Participants were generated from the FlyBase gene-group membership and mapped to UniProtKB by projects/FLYBASE_GENE_GROUPS/generate_modules.py from module_specs/dmel_respiratory_complex_assembly_factors.yaml. Member genes with a gene review in this repository: CG34117.

5Nodes
4Parts
0Variant Sets
0Variants
24Annotons
0Connections

Derived QC

Recommended-field compliance

100.0% recommended fields populated

All recommended fields populated.

Module deep research

✗ none found

No MODULE:dmel_respiratory_complex_assembly_factors deep-research report alongside the module YAML.

Leaf nodes lacking representative members

✓ every leaf node grounds to a representative protein.

Template conformance

✓ every declared conforms_to bundle matches its template motif.

Function consistency and core coverage

No functional claims were checked. This does not establish consistency with gene or family reviews.

Gene-review completeness (1/24 grounded genes reviewed)

0 complete review(s) · 1 with deep research · 23 missing review · 0 reviewed but lacking deep research

Gene Review Complete Deep research
CG17734 A0A0B4K6E6 ✗ — —
CG11825 A0A0B4KEI1 ✗ — —
CG46459 A0A6H2EGA2 ✗ — —
CG12107 A1Z733 ✗ — —
CG30373 A1Z7B8 ✗ — —
CG12895 A1Z897 ✗ — —
sloth2 B7Z0X7 ✗ — —
CG34117 Q0KI97 ✓ 4/5 ✓
CG34150 Q0KI15 ✗ — —
CG14757 Q4V5I9 ✗ — —
Ttc19 Q8SYD0 ✗ — —
Sdhaf3 Q8SZ16 ✗ — —
Tmem70 Q95SS8 ✗ — —
CG10340 Q9VES8 ✗ — —
l(2)k14505 Q9VID7 ✗ — —
CG5131 Q9VJD0 ✗ — —
CG15283 Q9VJS6 ✗ — —
Bcs1 Q9VL22 ✗ — —
Sirup Q9VLU6 ✗ — —
CG15386 Q9VQ88 ✗ — —
Uqcc1 Q9VRZ7 ✗ — —
CG9921 Q9VXH4 ✗ — —
CG11699 Q9VYX5 ✗ — —
sloth1 Q9W3T5 ✗ — —

Details

Context
Drosophila melanogasterNCBITaxon:7227
mitochondrial inner membraneGO:0005743
Respiratory complex assembly factorsBiological Processdmel_respiratory_complex_assembly_factors

Non-subunit chaperones and assembly factors needed to build respiratory complexes II and III, respiratory supercomplexes and ATP synthase.

mitochondrial respiratory chain complex assemblyGO:0033108
Context
Drosophila melanogasterNCBITaxon:7227
mitochondrial inner membraneGO:0005743
Part 1: succinate dehydrogenase assembly
Complex II assembly factorsBiological Processcomplex_ii_assembly

Annotons

CG12895 Complex II assembly factors
complex_ii_assembly_cg12895
Participant: Gene Product: CG12895
Gene Product:

Processes

mitochondrial respiratory chain complex II assemblyGO:0034553
CG14757 Complex II assembly factors
complex_ii_assembly_cg14757
Participant: Gene Product: CG14757
Gene Product:

Processes

mitochondrial respiratory chain complex II assemblyGO:0034553
CG15283 Complex II assembly factors
complex_ii_assembly_cg15283
Participant: Gene Product: CG15283
Gene Product:

Processes

mitochondrial respiratory chain complex II assemblyGO:0034553
Sdhaf3 Complex II assembly factors
complex_ii_assembly_sdhaf3
Participant: Gene Product: Sdhaf3
Gene Product:

Processes

mitochondrial respiratory chain complex II assemblyGO:0034553
Sirup Complex II assembly factors
complex_ii_assembly_sirup
Participant: Gene Product: Sirup
Gene Product:

Processes

mitochondrial respiratory chain complex II assemblyGO:0034553
Part 2: cytochrome bc1 complex assembly
Complex III assembly factorsBiological Processcomplex_iii_assembly

Annotons

Bcs1 Complex III assembly factors
complex_iii_assembly_bcs1
Participant: Gene Product: Bcs1
Gene Product:

Processes

mitochondrial respiratory chain complex III assemblyGO:0034551
CG15386 Complex III assembly factors
complex_iii_assembly_cg15386
Participant: Gene Product: CG15386
Gene Product:

Processes

mitochondrial respiratory chain complex III assemblyGO:0034551
CG30373 Complex III assembly factors
complex_iii_assembly_cg30373
Participant: Gene Product: CG30373
Gene Product:

Processes

mitochondrial respiratory chain complex III assemblyGO:0034551
CG34150 Complex III assembly factors
complex_iii_assembly_cg34150
Participant: Gene Product: CG34150
Gene Product:

Processes

mitochondrial respiratory chain complex III assemblyGO:0034551
CG46459 Complex III assembly factors
complex_iii_assembly_cg46459
Participant: Gene Product: CG46459
Gene Product:

Processes

mitochondrial respiratory chain complex III assemblyGO:0034551
Ttc19 Complex III assembly factors
complex_iii_assembly_ttc19
Participant: Gene Product: Ttc19
Gene Product:

Processes

mitochondrial respiratory chain complex III assemblyGO:0034551
Uqcc1 Complex III assembly factors
complex_iii_assembly_uqcc1
Participant: Gene Product: Uqcc1
Gene Product:

Processes

mitochondrial respiratory chain complex III assemblyGO:0034551
sloth1 Complex III assembly factors
complex_iii_assembly_sloth1
Participant: Gene Product: sloth1
Gene Product:

Processes

mitochondrial respiratory chain complex III assemblyGO:0034551
sloth2 Complex III assembly factors
complex_iii_assembly_sloth2
Participant: Gene Product: sloth2
Gene Product:

Processes

mitochondrial respiratory chain complex III assemblyGO:0034551
Part 3: supercomplex (respirasome) assembly
Respiratory supercomplex assembly factorsBiological Processrespirasome_assembly

Annotons

CG11825 Respiratory supercomplex assembly factors
respirasome_assembly_cg11825
Participant: Gene Product: CG11825
Gene Product:

Processes

mitochondrial respirasome assemblyGO:0097250
CG12107 Respiratory supercomplex assembly factors
respirasome_assembly_cg12107
Participant: Gene Product: CG12107
Gene Product:

Processes

mitochondrial respirasome assemblyGO:0097250
CG17734 Respiratory supercomplex assembly factors
respirasome_assembly_cg17734
Participant: Gene Product: CG17734
Gene Product:

Processes

mitochondrial respirasome assemblyGO:0097250
CG9921 Respiratory supercomplex assembly factors
respirasome_assembly_cg9921
Participant: Gene Product: CG9921
Gene Product:

Processes

mitochondrial respirasome assemblyGO:0097250
Part 4: F1Fo ATP synthase assembly
ATP synthase assembly factorsBiological Processcomplex_v_assembly

Annotons

CG10340 ATP synthase assembly factors
complex_v_assembly_cg10340
Participant: Gene Product: CG10340
Gene Product:

Processes

mitochondrial proton-transporting ATP synthase complex assemblyGO:0033615
CG11699 ATP synthase assembly factors
complex_v_assembly_cg11699
Participant: Gene Product: CG11699
Gene Product:

Processes

mitochondrial proton-transporting ATP synthase complex assemblyGO:0033615
CG34117 ATP synthase assembly factors
complex_v_assembly_cg34117
Participant: Gene Product: CG34117
Gene Product:

Processes

mitochondrial proton-transporting ATP synthase complex assemblyGO:0033615
CG5131 ATP synthase assembly factors
complex_v_assembly_cg5131
Participant: Gene Product: CG5131
Gene Product:

Processes

mitochondrial proton-transporting ATP synthase complex assemblyGO:0033615
Tmem70 ATP synthase assembly factors
complex_v_assembly_tmem70
Participant: Gene Product: Tmem70
Gene Product:

Processes

mitochondrial proton-transporting ATP synthase complex assemblyGO:0033615
l(2)k14505 ATP synthase assembly factors
complex_v_assembly_l_2_k14505
Participant: Gene Product: l(2)k14505
Gene Product:
l(2)k14505UniProtKB:Q9VID7

Processes

mitochondrial proton-transporting ATP synthase complex assemblyGO:0033615