| Claim/Topic | Evidence type | Key details | Best supporting source |
|---|---|---|---|
| Gene identity / nomenclature | Direct for LMAN1L | Human target verified as **LMAN1L** (approved name: *lectin, mannose binding 1 like*), Ensembl **ENSG00000140506**; UniProt target in this task is **Q9HAT1** with synonyms including **ERGL**. OpenTargets confirms LMAN1L as a distinct human gene target. (pqac-00000000) | OpenTargets target page / evidence context, PMIDs listed in database evidence; context for ENSG00000140506, accessed via OpenTargets (no DOI; database context) (pqac-00000000) |
| L-type lectin family membership | Direct for LMAN1L | A foundational review explicitly lists **LMAN1L** as a member of the **animal L-type lectin** family, separate from **LMAN1/ERGIC-53**, **LMAN2/VIP36**, and **LMAN2L/VIPL**. (pqac-00000004, pqac-00000005) | Baines & Zhang 2007, *Trends Biochem Sci*; DOI: https://doi.org/10.1016/j.tibs.2007.06.006 (2007) (pqac-00000004, pqac-00000005) |
| Domain architecture / topology | Inference for LMAN1L | Based on its placement in the L-type lectin family and the UniProt/domain annotation supplied in the prompt (lectin legume-like / ConA-like domain), LMAN1L is likely a **type I membrane protein** with a **luminal carbohydrate-recognition domain (CRD)**, stalk/coiled-coil region, transmembrane helix, and short cytosolic tail; this is strongly inferred from the closest paralog LMAN1. (pqac-00000013, pqac-00000017) | Das 2012 thesis/article on LMAN1 structural basis (no clear journal DOI in retrieved context); summarized structural features of LMAN1 as analog (2012) (pqac-00000013, pqac-00000017) |
| Trafficking signals / cycling concept | Direct for LMAN1; Inference for LMAN1L | LMAN1 contains a **C-terminal FF motif** for COPII-mediated ER exit and **KK motif** for COPI-mediated retrieval, cycling between **ER, ERGIC, and cis-Golgi**. LMAN1L likely uses analogous early secretory pathway cycling logic if it retains similar motifs/topology. (pqac-00000001, pqac-00000002, pqac-00000011, pqac-00000012, pqac-00000016) | Baines & Zhang 2007, *Trends Biochem Sci*; DOI: https://doi.org/10.1016/j.tibs.2007.06.006 (2007) (pqac-00000001, pqac-00000002) |
| Cargo receptor mechanism (COPII/COPI, pH/Ca2+) | Direct for LMAN1; Inference for LMAN1L | For LMAN1-family cargo receptors, cargo loading occurs in ER and unloading in ERGIC/Golgi; this is influenced by **luminal pH** and **Ca2+** differences. LMAN1 mannose binding is Ca2+-sensitive, and the receptor recycles after cargo release. LMAN1L is therefore plausibly a **Ca2+/pH-sensitive lectin cargo receptor or transporter-like lectin** in the early secretory pathway. (pqac-00000006, pqac-00000008, pqac-00000014, pqac-00000016) | Zhang et al. 2023, *Biochem Soc Trans*; DOI: https://doi.org/10.1042/bst20220713 (2023) (pqac-00000006, pqac-00000008, pqac-00000014, pqac-00000016) |
| Structural architecture (cryo-EM 2024 analog) | Direct for LMAN1; Inference for LMAN1L | Full-length **ERGIC-53/LMAN1** was resolved by cryo-EM as a **tetramer** with a four-leaf-clover head, long coiled-coil stalk, and transmembrane domain, in complex with **MCFD2**. This provides the best modern structural analog for inferring LMAN1L overall architecture as an L-type lectin family member, though it is **not** direct LMAN1L evidence. (pqac-00000009) | Watanabe et al. 2024, *Nature Communications*; DOI: https://doi.org/10.1038/s41467-024-46747-1 (2024) (pqac-00000009) |
| Known cargos for LMAN1 as analogs | Direct for LMAN1; Inference for LMAN1L | LMAN1–MCFD2 is a validated cargo receptor for **coagulation factors V and VIII**; other reported cargos/affected proteins include **α1-antitrypsin (A1AT)**, **cathepsin C**, **cathepsin Z**, and additional proposed cargos such as **Mac-2BP**, **GABAARs**, and **MMP-9**. These establish the kind of glycoprotein-trafficking role LMAN1L might have, but **no specific LMAN1L cargo** was retrieved. (pqac-00000001, pqac-00000004, pqac-00000006, pqac-00000015) | Baines & Zhang 2007, *Trends Biochem Sci*; DOI: https://doi.org/10.1016/j.tibs.2007.06.006 (2007); Zhang et al. 2023, *Biochem Soc Trans*; DOI: https://doi.org/10.1042/bst20220713 (2023) (pqac-00000001, pqac-00000004, pqac-00000006, pqac-00000015) |
| Disease / trait associations for LMAN1L | Database association | OpenTargets links LMAN1L to several complex traits including **hypertension**, **alcohol drinking**, **osteoarthritis**, **hip osteoarthritis**, and **pregnancy-induced hypertension**; these appear to reflect aggregated association evidence rather than mechanism-resolving functional studies, so biological interpretation should be cautious. (pqac-00000000) | OpenTargets disease-target association context for LMAN1L (database evidence; no DOI in retrieved context) (pqac-00000000) |
| Localization | Inference for LMAN1L | No direct localization study for human LMAN1L was retrieved. Because LMAN1 and related L-type lectins operate in the **early secretory pathway**, the strongest current inference is that LMAN1L localizes to **ER/ERGIC/cis-Golgi-associated compartments** rather than being a classic cell-surface lectin. (pqac-00000004, pqac-00000010, pqac-00000011, pqac-00000016) | Baines & Zhang 2007, *Trends Biochem Sci*; DOI: https://doi.org/10.1016/j.tibs.2007.06.006 (2007) plus LMAN1 structural/functional analog evidence (pqac-00000004, pqac-00000010, pqac-00000011, pqac-00000016) |
| Limitations / knowledge gaps | Direct for LMAN1L | The retrieved corpus contains **very limited direct experimental literature** for human **LMAN1L/Q9HAT1**. No retrieved primary study directly established its cargo spectrum, precise subcellular localization, binding partners, or pathway-specific mechanism. Therefore, most functional annotation currently rests on **family membership plus paralog-based inference**, which must be labeled accordingly. (pqac-00000000, pqac-00000005, pqac-00000015) | Constraint from retrieved evidence set; explicit family-only mention in Baines & Zhang 2007 and absence of direct mechanistic LMAN1L studies in retrieved corpus (pqac-00000000, pqac-00000005, pqac-00000015) |


*Table: This table separates what is directly supported for human LMAN1L from what is inferred using the best-studied paralog LMAN1/ERGIC-53 and modern cargo receptor biology. It is useful for building a cautious functional annotation while making evidence strength explicit.*