Gene Rat Rattus norvegicus

Sftpb

surfactant protein B

protein coding

HumanMouseRat Sftpb

Reading the ortholog votes for human and mouse.

HGNC and MANE Select: not available for rat. HGNC names human genes; RGD is the authority here, and MANE Select is defined for human transcripts only.

Location: Cytogenetic band 4q32NCBI: 4:105,917,232-105,926,631 on the plus strand, GRCr8 (GCF_036323735.1), sequence NC_086022.1, annotation GCF_036323735.1-RS_2026_08 of 2026-08-17Ensembl: 4:105,917,578-105,927,646 on the plus strand, GRCr8 (GCA_036323735.1), release 116Coordinates are one-based with both ends included, as each source reports them.
Also known as: Sp-b

Gene identity, from NCBI Datasets · NCBI Datasets 18.38.0 · read 2026-09-30 ET · RGD:621700Data from NCBI, provided as is; NCBI's policies and disclaimers apply.

Silence this gene

The order page opens with Sftpb and rat filled in. The sequences are designed against the transcripts below; the price is on that page.

Order for Sftpb

sdASO, toASO or siRNA, chosen on the next page

Bring your own sequence Transcripts

For research use only. Not for use in diagnostic or therapeutic procedures.

Summary
Transcripts
Expression
Protein
Interactions
Pathways
Disease
Variants
Constraint
Orthologs
MicroRNAs
Long non-coding RNAs
Literature
Silencing this gene

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Ready in a moment

01 Summary and function

What Sftpb does

Involved in several processes, including cellular response to mechanical…

NCBI Gene summary

Ready in a moment

02 Transcripts and isoforms

The RNA a design targets

Reading NCBI Datasets and Ensembl.Still reading. A first read of a gene can take a while; this page waits up to 80 seconds for it, and its scripts then bring in this line, or a line saying what did not arrive.

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03 Expression by tissue

Where Sftpb is expressed

Expression by tissue: not available for rat. GTEx holds human tissues only, and the Human Protein Atlas is keyed on human genes.

Ready in a moment

04 Protein

The protein Sftpb encodes

Reading UniProt, InterPro, AlphaFold DB and PDBe.Still reading. A first read of a gene can take a while; this page waits up to 80 seconds for it, and its scripts then bring in this line, or a line saying what did not arrive.

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05 Interactions

Proteins STRING associates with Sftpb

Reading STRING.Still reading. A first read of a gene can take a while; this page waits up to 50 seconds for it, and its scripts then bring in this line, or a line saying what did not arrive.

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06 Pathways

Where Sftpb acts, as Reactome curates it

Reading UniProt and Reactome.Still reading. A first read of a gene can take a while; this page waits up to 60 seconds for it, and its scripts then bring in this line, or a line saying what did not arrive.

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07 Disease associations

Diseases linked to Sftpb

Disease associations: not available for rat. Open Targets and ClinGen curate human genes only. The human ortholog's page carries the associations.

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08 Variants

Classified variants of Sftpb

Clinical variants: not available for rat. ClinVar holds human variants only.

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09 Constraint

How much variation Sftpb tolerates

Constraint: not available for rat. gnomAD and Open Targets carry constraint for human genes only.

Ready in a moment

10 Orthologs

The same gene in mouse, rat and human

Reading the Alliance, NCBI, Ensembl Compara and RGD.Still reading. A first read of a gene can take a while; this page waits up to 145 seconds for it, and its scripts then bring in this line, or a line saying what did not arrive.

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11 MicroRNAs

MicroRNAs hosted within Sftpb

Reading Ensembl and miRBase.Still reading. A first read of a gene can take a while; this page waits up to 110 seconds for it, and its scripts then bring in this line, or a line saying what did not arrive.

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12 Long non-coding RNAs

Long non-coding RNAs at the Sftpb locus

Reading Ensembl.Still reading. A first read of a gene can take a while; this page waits up to 110 seconds for it, and its scripts then bring in this line, or a line saying what did not arrive.

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13 Literature

Papers that mention Sftpb

Reading Europe PMC.Still reading. A first read of a gene can take a while; this page waits up to 55 seconds for it, and its scripts then bring in this line, or a line saying what did not arrive.

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14 Silencing this gene

From Sftpb to a sequence that silences it

The AUMsilence platform designs the sequences against the rat transcripts on this page. Six decisions are yours before it does. What is written under each is AUM's guidance; the timings and the concentrations are in the usage guide below.

01
Choose the region
A knockdown oligonucleotide can sit in the 5' untranslated region, the coding sequence or the 3' untranslated region, and all three are used. The coding sequence and the 3' untranslated region are the usual first choices for an RNase H design; the 5' end near the start codon suits a steric block. The map above shows where each region sits on the isoforms it draws.
02
Cover the isoforms you mean
An exon every isoform carries silences the whole gene; an exon only some isoforms carry silences those and spares the rest. Decide which you want before a sequence is chosen, and check the reference transcript (MANE Select in human; RefSeq Select and Ensembl canonical in mouse and rat) is the one your cells express.
03
Think across species early
The orthologs panel says whether mouse and rat carry the same gene. Whether one oligonucleotide can serve two species is a sequence question, settled at design by matching the candidate against each transcript, not by the protein identity shown there.
04
Check expression in your model
A transcript that is not expressed in your cells cannot show knockdown. Confirm the gene is expressed in the cell type and condition you will use, from your own data or a reference atlas, before the order. The expression panel above gives GTEx's median per tissue for a human gene; for mouse and rat it says that no atlas is on this page yet.
05
Run the controls
A scramble control of the same chemistry, a positive control against a gene known to knock down in your cells, untreated cells, and a mock condition where a transfection reagent is used. Read knockdown at the RNA level first, then at the protein; the usage guide gives the timing and the concentrations to start from.
06
Pick the product
AUMsilence sdASO needs no transfection reagent and works in the cells that resist one. AUMsilence toASO is the transfection-optimised version of the same design, and AUMsiRNA is the siRNA route. The selection guide compares them.

Order for Sftpb Bring your own sequence The usage guide Selection guide

For research use only. Not for use in diagnostic or therapeutic procedures.

Gene Rat Rattus norvegicus

Sftpb

Reading the record for Sftpb from NCBI Gene and Ensembl.Still reading. A first read of a gene can take a while; this page waits up to 115 seconds for it, and its scripts then bring in the page, or a line saying what did not arrive.

The full name, the identifiers, the location and the notes from the sources arrive with the record. Nothing is filled in ahead of it.

Order door

The door to order for Sftpb opens with the record, which decides which product it carries. The order page itself is open now.

Bring your own sequence

For research use only. Not for use in diagnostic or therapeutic procedures.

This page is still reading the record. Its scripts replace this shell with the record when it arrives; with scripts off, it stays at this shell however long you wait.

01 Summary and function

What Sftpb does

Waiting for the record before reading NCBI Gene and UniProt.

02 Transcripts and isoforms

The RNA a design targets

Waiting for the record before reading NCBI Datasets and Ensembl.

03 Expression by tissue

Where Sftpb is expressed

Waiting for the record before reading GTEx and the Human Protein Atlas.

04 Protein

The protein Sftpb encodes

Waiting for the record before reading UniProt, InterPro, AlphaFold DB and PDBe.

05 Interactions

Proteins STRING associates with Sftpb

Waiting for the record before reading STRING.

06 Pathways

Where Sftpb acts, as Reactome curates it

Waiting for the record before reading UniProt and Reactome.

07 Disease associations

Diseases linked to Sftpb

Waiting for the record before reading Open Targets and ClinGen.

08 Variants

Classified variants of Sftpb

Waiting for the record before reading ClinVar.

09 Constraint

How much variation Sftpb tolerates

Waiting for the record before reading gnomAD and Open Targets.

10 Orthologs

The same gene in mouse, rat and human

Waiting for the record before reading the Alliance, NCBI, Ensembl Compara and RGD.

11 MicroRNAs

MicroRNAs hosted within Sftpb

Waiting for the record before reading Ensembl and miRBase.

12 Long non-coding RNAs

Long non-coding RNAs at the Sftpb locus

Waiting for the record before reading Ensembl.

13 Literature

Papers that mention Sftpb

Waiting for the record before reading Europe PMC.

Accession	Name	Biotype	Labels	Exons	Spliced length	Protein	Sequence
NM_138842.2matches ENSRNOT00000150973.1	none given	protein coding	RefSeq Select	11	1,494 nt	376 aaNP_620197.2	Ready in a moment
XM_006236657.6	transcript variant X1	protein coding model	none	11	1,782 nt	353 aaXP_006236719.1	Ready in a moment

Accession	Name	Biotype	Labels	Exons	Spliced length	Protein	Sequence
NM_138842.2matches ENSRNOT00000150973.1	none given	protein coding	RefSeq Select	11	1,494 nt	376 aaNP_620197.2	Ready in a moment
XM_006236657.6	transcript variant X1	protein coding model	none	11	1,782 nt	353 aaXP_006236719.1	Ready in a moment

Accession	Name	Biotype	Labels	Exons	Spliced length	Protein	Sequence
ENSRNOT00000150973.1	Sftpb-202	protein coding	Ensembl canonical	12	2,440 nt	376 aaENSRNOP00000103580.1	Ready in a moment
ENSRNOT00000014505.9	Sftpb-201	protein coding	none	10	1,423 nt	349 aaENSRNOP00000014505.5	Ready in a moment

Sftpb

What Sftpb does

The RNA a design targets

Where Sftpb is expressed

The protein Sftpb encodes

Proteins STRING associates with Sftpb

Where Sftpb acts, as Reactome curates it

Diseases linked to Sftpb

Classified variants of Sftpb

How much variation Sftpb tolerates

The same gene in mouse, rat and human

MicroRNAs hosted within Sftpb

Long non-coding RNAs at the Sftpb locus

Papers that mention Sftpb

From Sftpb to a sequence that silences it

Choose the region

Cover the isoforms you mean

Think across species early

Check expression in your model

Run the controls

Pick the product

Sftpb

What Sftpb does

The RNA a design targets

Where Sftpb is expressed

The protein Sftpb encodes

Proteins STRING associates with Sftpb

Where Sftpb acts, as Reactome curates it

Diseases linked to Sftpb

Classified variants of Sftpb

How much variation Sftpb tolerates

The same gene in mouse, rat and human

MicroRNAs hosted within Sftpb

Long non-coding RNAs at the Sftpb locus

Papers that mention Sftpb

Sftpb

What Sftpb does

Gene summary

Protein function

The RNA a design targets

RefSeq 2 transcripts

A window on one transcript

Ensembl 2 transcripts

A window on one transcript

Where Sftpb is expressed

The protein Sftpb encodes

Proteins STRING associates with Sftpb

Where Sftpb acts, as Reactome curates it

Diseases linked to Sftpb

Classified variants of Sftpb

How much variation Sftpb tolerates

The same gene in mouse, rat and human

MicroRNAs hosted within Sftpb

Long non-coding RNAs at the Sftpb locus

Papers that mention Sftpb

From Sftpb to a sequence that silences it

Choose the region

Cover the isoforms you mean

Think across species early

Check expression in your model

Run the controls

Pick the product

Gene summary

Protein function

RefSeq 2 transcripts

A window on one transcript

Ensembl 2 transcripts

A window on one transcript