| Antibodies | ||
| Chicken anti-GFP | Aves Labs |
Cat#: GFP-1010; RID: AB_2307313 |
| Mouse anti-GFP clone B-2 | Santa Cruz |
Cat#: SC-9996; RRID: AB_627695 |
| Mouse anti-c-myc clone 9E10 | Santa Cruz |
Cat#: SC-40; RRID: AB_627268 |
| Rabbit anti-6x-His Tag | Thermo-Fisher |
Cat#: PA1-983B; RRID: AB_1069891 |
| Goat anti-MBP clone D-18 | Santa Cruz |
Cat#: SC-13912; RRID: AB_648794 |
| Mouse anti-PSD95 clone 7E3-1B8 | Thermo-Fisher |
Cat#: MA1-046; RRID: AB_2092361 |
| Rabbit anti-Histone H3 clone D1H2 | Cell Signaling Technology |
Cat#: 4499; RRID: AB_10544537 |
| Rabbit anti-Synaptophysin clone SVP-38 | Sigma-Aldrich |
Cat#: S5768; RRID: AB_477523 |
| Rat anti-Nectin3 clone 103-A1 | Hycult Biotech |
Cat#: HM1053; RRID: AB_533278 |
| Rabbit anti-Nectin3 | Abcam |
Cat#: AB63931; RRID: AB_1142394 |
| Mouse anti-GluK5/KA2 clone N279B/27 | NeuroMab |
Cat#: 75-362; RRID: AB_2315855 |
| Rabbit anti-Synaptoporin | Synaptic Systems |
Cat#: 102 002; RRID: AB_887841 |
| Guinea pig anti-VGluT1 | Merck Millipore |
Cat#: AB5905; RRID: AB_2301751 |
| Rabbit anti-Synapsin3 | Synaptic Systems |
Cat#: 106 303; RRID: AB_2619775 |
| Rabbit anti-Afadin clone A7L9H48 | Thermo-Fisher |
Cat#: 700193; RRID: AB_2532299 |
| Chicken anti-ZnT3 | Synaptic Systems |
Cat#: 197 006; RRID: AB_2725754 |
| Rabbit anti-mGluR2/3 | Merck Millipore |
Cat#: AB1553; RRID: AB_11212089 |
| Rabbit anti-CRTAC1 | Merck Millipore | Cat#: ABD80 |
| Rabbit anti-BRINP2 | Atlas Antibodies |
Cat#: HPA061920; RRID: AB_2684639 |
| Goat anti-IgSF8 | R&D Systems |
Cat#: AF3117; RRID: AB_2233385 |
| Rabbit anti-FAM171A2 | ThermoFisher |
Cat#: PA5-71105; RRID: AB_2689922 |
| Rabbit anti-RPTPd | Novus | Cat#: NBP2-49153 |
| Goat anti-RPTPs | R&D Systems |
Cat#: AF3430; RRID: AB_2175157 |
| Sheep anti-Teneurin-4 | R&D Systems |
Cat#: AF6320; RRID: AB_10920937 |
| Mouse anti-PSA-NCAM1 | Merck Millipore |
Cat#: MAB5324; RRID: AB_95211 |
| Rat anti-NCAM2 | R&D Systems |
Cat#: MAB778; RRID: AB_2149709 |
| Sheep anti-ISLR2 | R&D Systems |
Cat#: AF4650; RRID: AB_2126610 |
| Goat anti-NEGR1/Kilon | R&D Systems |
Cat#: AF5394; RRID: AB_2150086 |
| Mouse anti-Neuronal pentraxin 1 | BD Biosciences |
Cat#: 610369; RRID: AB_397754 |
| Goat anti-NRP1 | R&D Systems |
Cat#: AF566; RRID: AB_355445 |
| Goat anti-NRP2 | R&D Systems |
Cat#: AF2215; RRID: AB_2155371 |
| Sheep anti-Noelin | R&D Systems |
Cat#: AF4636; RRID: AB_2157225 |
| Goat anti-Plexin-A3 | Thermo-Fisher |
Cat#: PA5-47571; RRID: AB_2608296 |
| Rabbit anti-ROBO2 | Aviva Systems |
Cat#: ARP45396_P050; RRID: AB_2047840 |
| Goat anti-Neogenin | R&D Systems |
Cat#: AF1079; RRID: AB_2151002 |
| Sheep anti-SALM2 | R&D Systems |
Cat#: AF5669; RRID: AB_1964706 |
| Mouse anti-Tenascin-R | R&D Systems |
Cat#: MAB1624; RRID: AB_2207001 |
| Sheep anti-Contactin 1 | R&D Systems | Cat#: AF7549 |
| Goat anti-CD200 | R&D Systems | Cat#: AF2724 |
| Goat anti-ICAM5 | Novus |
Cat#: NB100-53815; RRID: AB_829163 |
| Goat anti-SCFR/Kit | R&D Systems |
Cat#: AF1356; RRID: AB_354750 |
| Mouse anti-LSAMP | Developmental Studies Hybridoma Bank |
Cat#: 2G9; RRID: AB_2138210 |
| Mouse anti-Trk-C | R&D Systems |
Cat#: MAB373; RRID: AB_2155422 |
| Goat anti-Plexin-A1 | R&D systems |
Cat#: AF4309; RRID: AB_10645644 |
| Rat anti-HA | Roche |
Cat#: 11867423001; RRID: AB 390918 |
| Rabbit anti-pERM | Cell Signaling |
Cat#: 3726; RRID:AB 10560513 |
| Goat anti-Chicken Alexa 488 | Thermo-Fisher |
Cat# A-11039; RRID: AB_2534096 |
| Donkey anti-Goat Alexa 488 | Thermo-Fisher |
Cat#: A-11055; RRID: AB_2534102 |
| Donkey anti-Goat Alexa 647 | Thermo-Fisher |
Cat#: A-21447; RRID: AB_2535864 |
| Donkey anti-Rabbit Alexa 488 | Thermo-Fisher |
Cat#: A-21206; RRID: AB_2535792 |
| Donkey anti-Rabbit Alexa 555 | Thermo-Fisher |
Cat#: A-31572; RRID: AB_162543 |
| Donkey anti-Rabbit Alexa 647 | Thermo-Fisher |
Cat#: A-31573; RRID: AB_2536183 |
| Donkey anti-Mouse Alexa 488 | Thermo-Fisher |
Cat#: A21202; RRID: AB_141607 |
| Donkey anti-Mouse Alexa 555 | Thermo-Fisher |
Cat#: A31570; RRID: AB_2536180 |
| Donkey anti-Mouse Alexa 647 | Thermo-Fisher |
Cat#: A-31571; RRID: AB_162542 |
| Donkey anti-Sheep Alexa 488 | Thermo-Fisher |
Cat# A-11015; RRID: AB_2534082 |
| Donkey anti-Sheep Alexa 647 | Thermo-Fisher |
Cat#: A-21448; RRID: AB_2535865 |
| Donkey anti-Chicken Alexa 488 | Jackson ImmunoResearch |
Cat# 703-545-155; RRID: AB_2340375 |
| Donkey anti-Rat Alexa 647 | Jackson ImmunoResearch |
Cat#: 712-605-153; RRID: AB_2340694 |
| Donkey anti-Guinea Pig Cy3 | Jackson ImmunoResearch |
Cat# 706-165-148; RRID: AB_2340460 |
| Donkey anti-Guinea Pig Alexa 647 | Jackson ImmunoResearch |
Cat#: 706-605-148; RRID: AB_2340476 |
| Donkey anti-Human IgG, Fc Fragment Cy3 | Jackson ImmunoResearch |
Cat#: 709-165-098; RRID: AB_2340534 |
| HRP Rabbit anti-Goat IgG | Thermo-Fisher |
Cat#: 81-1620; RRID: AB_2534006 |
| HRP Rabbit anti-Sheep IgG | Thermo-Fisher |
Cat#: 61-8620; RRID: AB_2533942 |
| HRP Goat anti-Mouse IgG | Thermo-Fisher |
Cat#: 62-6520; RRID: AB_2533947 |
| HRP Goat anti-Rabbit IgG | Thermo-Fisher |
Cat#: 65-6120; RRID: AB_2533967 |
| Placental alkaline phosphatase monoclonal antibody (8B6.18) | Thermo-Fisher |
Cat#: MA5-12694; RRID: AB_10978663 |
| HRP mouse anti-Human IgG1 | Serotec | Cat#: MCA514P |
| Bacterial and virus strains | ||
| AAV2/9-hsyn1-mGFP | This paper | N/A |
| AAV2/9-hsyn1-mGFP-T2A-Cre | This paper | N/A |
| AAV2/9-Ef1a-DIO-hChR2(E123T/T159C)-EYFP | 126 |
Cat#: Addgene plasmid #35509; RRID: Addgene_35509 |
| Chemicals, peptides, and recombinant proteins | ||
| IgSF8-Fc | This paper | N/A |
| IgSF8-His | Sino Biological | Cat#: 51042-M08H |
| Tenascin-R-Fc | This paper | N/A |
| Brevican-Fc | This paper | N/A |
| Neurexin1β-Fc | 127 | N/A |
| Hoechst 33342 | Thermo-Fisher | Cat#: H3570 |
| FM™ 4-64FX, fixable analog | Thermo-Fisher | Cat#: F34653 |
| ChromPure Human IgG, Fc fragment | Jackson Immunoresearch |
Cat#: 009-000-008; RRID: AB_2337046 |
| AffiniPure Fab Fragment Donkey anti-Mouse IgG (H + L) | Jackson Immunoresearch |
Cat#: 715-007-003; RRID: AB_2307338 |
| FuGENE 6 Transfection Reagent | Promega | Cat#: E2691 |
| AMAXA Nucleofector kit | Lonza | Cat#:VPG-1001 |
| 1-Step Ultra TMB-ELISA HRP | Thermo-Fisher | Cat#: 34028 |
| Critical commercial assays | ||
| Myelin-Removal Beads II, human, mouse, rat | Miltenyi Biotec | Cat#: 130-096-733 |
| Mix-n-Stain™ CF™ 488 A Antibody Labeling Kit | Sigma-Aldrich |
Cat#: MX488AS100; RRID: AB_10961132 |
| Pierce™ Antibody Clean-up Kit | Thermo-Fisher | Cat#: 44600 |
| Gibson Assembly Cloning Kit | New England Biolabs | Cat#: E5510S |
| Deposited data | ||
| Proteomic analysis of sorted MF synaptosomes and P2 synaptosomes | Proteome Exchange | PXD013492 |
| Experimental models: cell lines | ||
| Human: HEK293T cells | ATCC |
Cat#: CRL-11268 RRID: CVCL_1926 |
| Human: HEK293F suspension adapted | Thermo-Fisher | Cat # R790-07 |
| Mouse: hippocampal primary neurons cultured from embryonic day 18 Igsf8 conditional knock out mice | This paper | N/A |
| Experimental models: organisms/strains | ||
| Mouse: Igsf8 cKO (B6D2;129S2-Igsf8tm1.1Osb) | Riken Institute64 |
Cat#: RBRC05637; RRID: IMSR_RBRC05637 |
| Mouse: Tg(Rbp4-cre)KL100Gsat | GENSAT |
Cat#: 031125-UCD; RRID: MMRRC_031125-UCD |
| Mouse: C57BL/6 J | JAX |
Cat#: 000664; RRID: IMSR_JAX:000664 |
| Recombinant DNA | ||
| Plasmid: FUGW-mCherry | 115 | N/A |
| Plasmid: FUGW-CRE-T2A-mCherry | 115 | N/A |
| Plasmid: FUGW-mGFP-T2A-HA-IgSF8 | This paper | N/A |
| Plasmid: FUGW-GFP-T2A-HA-IgSF8 | This paper | N/A |
| Plasmid: pAAV-hsyn1-mGFP | This paper | N/A |
| Plasmid: pAAV-hsyn1-mGFP-T2A-Cre | This paper | N/A |
| Plasmid: pAAV-Ef1a-DIO-hChR2(E123T/T159C)-EYFP | 126 | Cat#: Addgene plasmid #35509; RRID:Addgene_35509 |
| Plasmid: pBOS-EGFP | 128 | N/A |
| Plasmid: pBOS-myc-LRRTM2 | 127 | N/A |
| Plasmid: pEGFP-N1 | Clontech (TaKaRa) | N/A |
| Plasmid: pEGFP-N1-IgSF8 | This paper | N/A |
| Plasmid: pEGFP-N1-Tenascin-R | This paper | N/A |
| Plasmid: 4F2hc-Fc/AP | This paper | |
| Plasmid: ADAM11-Fc/AP | This paper | |
| Plasmid: ADAM22-Fc/AP | This paper | |
| Plasmid: ADAM23-Fc/AP | This paper | |
| Plasmid: ALCAM-Fc/AP | This paper | |
| Plasmid: APMAP-Fc/AP | This paper | |
| Plasmid: BRINP2-Fc/AP | This paper | |
| Plasmid: CADM4-Fc/AP | This paper | |
| Plasmid: CD200-Fc/AP | This paper | |
| Plasmid: CNTN1-Fc/AP | This paper | |
| Plasmid: CNTNAP2-Fc/AP | This paper | |
| Plasmid: CRTAC1-Fc/AP | This paper | |
| Plasmid: ELFN1-Fc/AP | This paper | |
| Plasmid: ELFN2-Fc/AP | This paper | |
| Plasmid: EPHA4-Fc/AP | This paper | |
| Plasmid: EPHA6-Fc/AP | This paper | |
| Plasmid: EPHA7-Fc/AP | This paper | |
| Plasmid: EPHB2-Fc/AP | This paper | |
| Plasmid: EPHB4-Fc/AP | This paper | |
| Plasmid: FAM171A2-Fc/AP | This paper | |
| Plasmid: GPR37L1-Fc/AP | This paper | |
| Plasmid: HAPLN1-Fc/AP | This paper | |
| Plasmid: HEPACAM-Fc/AP | This paper | |
| Plasmid: ICAM5-Fc/AP | This paper | |
| Plasmid: IgSF8-Fc/AP | This paper | |
| Plasmid: ISLR2-Fc/AP | This paper | |
| Plasmid: KIT/SCFR-Fc/AP | This paper | |
| Plasmid: L1CAM-Fc/AP | This paper | |
| Plasmid: LGI1-Fc/AP | This paper | |
| Plasmid: LINGO1-Fc/AP | This paper | |
| Plasmid: Lphn1-Fc/AP | This paper | |
| Plasmid: Lphn3-Fc/AP | This paper | |
| Plasmid: LRFN1/SALM2-Fc/AP | This paper | |
| Plasmid: LRRC4B/NGL3-Fc/AP | This paper | |
| Plasmid: LSAMP/IgLON3-Fc/AP | This paper | |
| Plasmid: NCAM1-Fc/AP | This paper | |
| Plasmid: NCAM2-Fc/AP | This paper | |
| Plasmid: Nectin3-Fc/AP | This paper | |
| Plasmid: NEGR1/IgLON4-Fc/AP | This paper | |
| Plasmid: Neogenin-Fc/AP | This paper | |
| Plasmid: Neurofascin-Fc/AP | This paper | |
| Plasmid: NLGN1-Fc/AP | This paper | |
| Plasmid: NLGN2-Fc/AP | This paper | |
| Plasmid: NLGN3-Fc/AP | This paper | |
| Plasmid: NPTN-Fc/AP | This paper | |
| Plasmid: NPTX1-Fc/AP | This paper | |
| Plasmid: Noelin-Fc/AP | This paper | |
| Plasmid: NrCAM-Fc/AP | This paper | |
| Plasmid: NRP1-Fc/AP | This paper | |
| Plasmid: NRP2-Fc/AP | This paper | |
| Plasmid: NRXN1α-Fc/AP | This paper | |
| Plasmid: NRXN3α-Fc/AP | This paper | |
| Plasmid: NRXN1β-Fc/AP | This paper | |
| Plasmid: NRXN3β-Fc/AP | This paper | |
| Plasmid: Neurotrimin/IgLON2-Fc/AP | This paper | |
| Plasmid: PlexinA1-Fc/AP | This paper | |
| Plasmid: PlexinA2-Fc/AP | This paper | |
| Plasmid: PlexinA3-Fc/AP | This paper | |
| Plasmid: PlexinA4-Fc/AP | This paper | |
| Plasmid: PlexinB1-Fc/AP | This paper | |
| Plasmid: PlexinC1-Fc/AP | This paper | |
| Plasmid: RPTPα-Fc/AP | This paper | |
| Plasmid: RPTPδ-Fc/AP | This paper | |
| Plasmid: RPTPf/LAR-Fc/AP | This paper | |
| Plasmid: RPTPσ-Fc/AP | This paper | |
| Plasmid: ROBO1-Fc/AP | This paper | |
| Plasmid: ROBO2-Fc/AP | This paper | |
| Plasmid: Shisa6-Fc/AP | This paper | |
| Plasmid: SIRPα-Fc/AP | This paper | |
| Plasmid: Teneurin4-Fc/AP | This paper | |
| Plasmid: TenR-Fc/AP | This paper | |
| Plasmid: TrkC-Fc/AP | This paper | |
| Plasmid: VCAM1-Fc/AP | This paper | |
| Mouse IgSF8 cDNA clone | Origene | MC206708 |
| Mouse Tenascin-R cDNA clone | Source Bioscience | IRCKp5014L0710Q |
| Mouse Brevican cDNA clone | Source Bioscience | IRAVp968B01111D |
| Software and algorithms | ||
| Fiji | NIH |
RRID: SCR_002285 |
| Imaris | BITPLANE |
http://www.bitplane.com/imaris; RRID: SCR_007370 |
| Microscope Image Browser (MIB) | University of Helsinki | http://mib.helsinki.fi/index.htm |
| GraphPad Prism8 | GraphPad Software, Inc |
https://www.graphpad.com/scientific-software/prism/; RRID: SCR_002798 |