- PDB-7k0k: Human serine palmitoyltransferase complex SPTLC1/SPLTC2/ssSPTa, 3... -
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基本情報
登録情報
データベース: PDB / ID: 7k0k
タイトル
Human serine palmitoyltransferase complex SPTLC1/SPLTC2/ssSPTa, 3KS-bound
要素
Serine palmitoyltransferase 1
Serine palmitoyltransferase 2
Serine palmitoyltransferase small subunit A
キーワード
MEMBRANE PROTEIN / Sphingolipid
機能・相同性
機能・相同性情報
sphinganine biosynthetic process / regulation of fat cell apoptotic process / sphingomyelin biosynthetic process / serine palmitoyltransferase complex / serine C-palmitoyltransferase activity / serine C-palmitoyltransferase / sphingosine biosynthetic process / sphingolipid metabolic process / sphingolipid biosynthetic process / Sphingolipid de novo biosynthesis ...sphinganine biosynthetic process / regulation of fat cell apoptotic process / sphingomyelin biosynthetic process / serine palmitoyltransferase complex / serine C-palmitoyltransferase activity / serine C-palmitoyltransferase / sphingosine biosynthetic process / sphingolipid metabolic process / sphingolipid biosynthetic process / Sphingolipid de novo biosynthesis / ceramide biosynthetic process / positive regulation of lipophagy / adipose tissue development / pyridoxal phosphate binding / intracellular protein localization / endoplasmic reticulum membrane / endoplasmic reticulum 類似検索 - 分子機能
: / Small subunit of serine palmitoyltransferase-like / Small subunit of serine palmitoyltransferase-like / : / Aminotransferase, class-II, pyridoxal-phosphate binding site / Aminotransferases class-II pyridoxal-phosphate attachment site. / Aminotransferase, class I/classII / Aminotransferase class I and II / Pyridoxal phosphate-dependent transferase, small domain / Pyridoxal phosphate-dependent transferase, major domain / Pyridoxal phosphate-dependent transferase 類似検索 - ドメイン・相同性
3-Dehydrosphinganine / Serine palmitoyltransferase 1 / Serine palmitoyltransferase 2 / Serine palmitoyltransferase small subunit A 類似検索 - 構成要素
ジャーナル: Nat Struct Mol Biol / 年: 2021 タイトル: Structural insights into the regulation of human serine palmitoyltransferase complexes. 著者: Yingdi Wang / Yiming Niu / Zhe Zhang / Kenneth Gable / Sita D Gupta / Niranjanakumari Somashekarappa / Gongshe Han / Hongtu Zhao / Alexander G Myasnikov / Ravi C Kalathur / Teresa M Dunn / Chia-Hsueh Lee / 要旨: Sphingolipids are essential lipids in eukaryotic membranes. In humans, the first and rate-limiting step of sphingolipid synthesis is catalyzed by the serine palmitoyltransferase holocomplex, which ...Sphingolipids are essential lipids in eukaryotic membranes. In humans, the first and rate-limiting step of sphingolipid synthesis is catalyzed by the serine palmitoyltransferase holocomplex, which consists of catalytic components (SPTLC1 and SPTLC2) and regulatory components (ssSPTa and ORMDL3). However, the assembly, substrate processing and regulation of the complex are unclear. Here, we present 8 cryo-electron microscopy structures of the human serine palmitoyltransferase holocomplex in various functional states at resolutions of 2.6-3.4 Å. The structures reveal not only how catalytic components recognize the substrate, but also how regulatory components modulate the substrate-binding tunnel to control enzyme activity: ssSPTa engages SPTLC2 and shapes the tunnel to determine substrate specificity. ORMDL3 blocks the tunnel and competes with substrate binding through its amino terminus. These findings provide mechanistic insights into sphingolipid biogenesis governed by the serine palmitoyltransferase complex.
履歴
登録
2020年9月4日
登録サイト: RCSB / 処理サイト: RCSB
改定 1.0
2021年2月24日
Provider: repository / タイプ: Initial release
改定 1.0
2021年2月24日
Data content type: EM metadata / Data content type: EM metadata / Provider: repository / タイプ: Initial release
改定 1.0
2021年2月24日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2021年2月24日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
改定 1.0
2021年2月24日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2021年2月24日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Database references / Experimental summary / Data content type: EM metadata / EM metadata / カテゴリ: database_2 / em_admin / Data content type: EM metadata / EM metadata / EM metadata Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_admin.last_update
Data content type: EM metadata Data content type: EM metadata / EM metadata ...EM metadata / EM metadata / EM metadata / EM metadata / EM metadata Group: Data processing / Experimental summary ...Data processing / Experimental summary / Other / Source and taxonomy / Structure summary Data content type: EM metadata / EM metadata ...EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata カテゴリ: em_admin / em_entity_assembly ...em_admin / em_entity_assembly / em_software / entity / entity_poly / entity_src_gen Data content type: EM metadata / EM metadata ...EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata Item: _chem_comp.name / _chem_comp.pdbx_synonyms ..._chem_comp.name / _chem_comp.pdbx_synonyms / _em_admin.last_update / _em_entity_assembly.entity_id_list / _em_software.name / _entity_poly.nstd_monomer / _entity_poly.pdbx_seq_one_letter_code / _entity_src_gen.gene_src_common_name
Serinepalmitoyltransferase1 / Long chain base biosynthesis protein 1 / LCB 1 / Serine-palmitoyl-CoA transferase 1 / SPT1
分子量: 52806.770 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: SPTLC1, LCB1 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: O15269, serine C-palmitoyltransferase
#2: タンパク質
Serinepalmitoyltransferase2 / Long chain base biosynthesis protein 2 / LCB 2 / Long chain base biosynthesis protein 2a / LCB2a / ...Long chain base biosynthesis protein 2 / LCB 2 / Long chain base biosynthesis protein 2a / LCB2a / Serine-palmitoyl-CoA transferase 2 / SPT 2