diff --git a/crypto/types/multisig/threshold_pubkey_test.go b/crypto/types/multisig/threshold_pubkey_test.go
index 4eaf52ffa1..cb40646032 100644
--- a/crypto/types/multisig/threshold_pubkey_test.go
+++ b/crypto/types/multisig/threshold_pubkey_test.go
@@ -193,7 +193,7 @@ func TestMultiSigMigration(t *testing.T) {
 	err := multisig.AddSignatureFromPubKey(multisignature, sigs[0], pkSet[0], pkSet)
 
 	// create a StdSignature for msg, and convert it to sigV2
-	sig := authtypes.StdSignature{PubKey: pkSet[1].Bytes(), Signature: msg}
+	sig := authtypes.StdSignature{PubKey: pkSet[1], Signature: msg}
 	sigV2, err := authtypes.StdSignatureToSignatureV2(cdc, sig)
 	require.NoError(t, multisig.AddSignatureV2(multisignature, sigV2, pkSet))
 
diff --git a/x/auth/ante/basic.go b/x/auth/ante/basic.go
index 695cb6ebdf..05053d3d83 100644
--- a/x/auth/ante/basic.go
+++ b/x/auth/ante/basic.go
@@ -123,7 +123,7 @@ func (cgts ConsumeTxSizeGasDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, sim
 			// use stdsignature to mock the size of a full signature
 			simSig := types.StdSignature{ //nolint:staticcheck // this will be removed when proto is ready
 				Signature: simSecp256k1Sig[:],
-				PubKey:    pubkey.Bytes(),
+				PubKey:    pubkey,
 			}
 
 			sigBz := legacy.Cdc.MustMarshalBinaryBare(simSig)
diff --git a/x/auth/ante/sigverify_test.go b/x/auth/ante/sigverify_test.go
index c980878cd2..7e78a31dd9 100644
--- a/x/auth/ante/sigverify_test.go
+++ b/x/auth/ante/sigverify_test.go
@@ -74,7 +74,7 @@ func (suite *AnteTestSuite) TestConsumeSignatureVerificationGas() {
 	multisignature1 := multisig.NewMultisig(len(pkSet1))
 	expectedCost1 := expectedGasCostByKeys(pkSet1)
 	for i := 0; i < len(pkSet1); i++ {
-		stdSig := types.StdSignature{PubKey: pkSet1[i].Bytes(), Signature: sigSet1[i]}
+		stdSig := types.StdSignature{PubKey: pkSet1[i], Signature: sigSet1[i]}
 		sigV2, err := types.StdSignatureToSignatureV2(cdc, stdSig)
 		suite.Require().NoError(err)
 		err = multisig.AddSignatureV2(multisignature1, sigV2, pkSet1)
diff --git a/x/auth/signing/verify_test.go b/x/auth/signing/verify_test.go
index 30f53013a0..55f1f75144 100644
--- a/x/auth/signing/verify_test.go
+++ b/x/auth/signing/verify_test.go
@@ -55,7 +55,7 @@ func TestVerifySignature(t *testing.T) {
 	signature, err := priv.Sign(signBytes)
 	require.NoError(t, err)
 
-	stdSig := types.StdSignature{PubKey: pubKey.Bytes(), Signature: signature}
+	stdSig := types.StdSignature{PubKey: pubKey, Signature: signature}
 	sigV2, err := types.StdSignatureToSignatureV2(cdc, stdSig)
 	require.NoError(t, err)
 
@@ -73,13 +73,13 @@ func TestVerifySignature(t *testing.T) {
 
 	sig1, err := priv.Sign(multiSignBytes)
 	require.NoError(t, err)
-	stdSig1 := types.StdSignature{PubKey: pubKey.Bytes(), Signature: sig1}
+	stdSig1 := types.StdSignature{PubKey: pubKey, Signature: sig1}
 	sig1V2, err := types.StdSignatureToSignatureV2(cdc, stdSig1)
 	require.NoError(t, err)
 
 	sig2, err := priv1.Sign(multiSignBytes)
 	require.NoError(t, err)
-	stdSig2 := types.StdSignature{PubKey: pubKey.Bytes(), Signature: sig2}
+	stdSig2 := types.StdSignature{PubKey: pubKey, Signature: sig2}
 	sig2V2, err := types.StdSignatureToSignatureV2(cdc, stdSig2)
 	require.NoError(t, err)
 
diff --git a/x/auth/types/client_tx_test.go b/x/auth/types/client_tx_test.go
index 2be71b74ca..26684ac202 100644
--- a/x/auth/types/client_tx_test.go
+++ b/x/auth/types/client_tx_test.go
@@ -3,6 +3,8 @@ package types_test
 import (
 	"testing"
 
+	cryptoAmino "github.com/cosmos/cosmos-sdk/crypto/codec"
+
 	"github.com/cosmos/cosmos-sdk/testutil/testdata"
 
 	"github.com/cosmos/cosmos-sdk/client/testutil"
@@ -17,6 +19,7 @@ import (
 func testCodec() *codec.Codec {
 	cdc := codec.New()
 	sdk.RegisterCodec(cdc)
+	cryptoAmino.RegisterCrypto(cdc)
 	cdc.RegisterConcrete(&testdata.TestMsg{}, "cosmos-sdk/Test", nil)
 	return cdc
 }
diff --git a/x/auth/types/stdtx.go b/x/auth/types/stdtx.go
index d8402c06cb..2434a27833 100644
--- a/x/auth/types/stdtx.go
+++ b/x/auth/types/stdtx.go
@@ -71,12 +71,7 @@ func (fee StdFee) GasPrices() sdk.DecCoins {
 
 // Deprecated
 func NewStdSignature(pk crypto.PubKey, sig []byte) StdSignature {
-	var pkBz []byte
-	if pk != nil {
-		pkBz = pk.Bytes()
-	}
-
-	return StdSignature{PubKey: pkBz, Signature: sig}
+	return StdSignature{PubKey: pk, Signature: sig}
 }
 
 // GetSignature returns the raw signature bytes.
@@ -86,13 +81,8 @@ func (ss StdSignature) GetSignature() []byte {
 
 // GetPubKey returns the public key of a signature as a crypto.PubKey using the
 // Amino codec.
-func (ss StdSignature) GetPubKey() (pk crypto.PubKey) {
-	if len(ss.PubKey) == 0 {
-		return nil
-	}
-
-	amino.MustUnmarshalBinaryBare(ss.PubKey, &pk)
-	return pk
+func (ss StdSignature) GetPubKey() crypto.PubKey {
+	return ss.PubKey
 }
 
 // MarshalYAML returns the YAML representation of the signature.
@@ -319,8 +309,8 @@ func StdSignBytes(chainID string, accnum uint64, sequence uint64, fee StdFee, ms
 
 // Deprecated: StdSignature represents a sig
 type StdSignature struct {
-	PubKey    []byte `json:"pub_key" yaml:"pub_key"` // optional
-	Signature []byte `json:"signature" yaml:"signature"`
+	crypto.PubKey `json:"pub_key" yaml:"pub_key"` // optional
+	Signature     []byte                          `json:"signature" yaml:"signature"`
 }
 
 // DefaultTxDecoder logic for standard transaction decoding
@@ -397,13 +387,6 @@ func StdSignatureToSignatureV2(cdc *codec.Codec, sig StdSignature) (signing.Sign
 
 // SignatureV2ToStdSignature converts a SignatureV2 to a StdSignature
 func SignatureV2ToStdSignature(cdc *codec.Codec, sig signing.SignatureV2) (StdSignature, error) {
-	var pubKeyBz []byte
-
-	pubKey := sig.PubKey
-	if pubKey != nil {
-		pubKeyBz = pubKey.Bytes()
-	}
-
 	var (
 		sigBz []byte
 		err   error
@@ -417,7 +400,7 @@ func SignatureV2ToStdSignature(cdc *codec.Codec, sig signing.SignatureV2) (StdSi
 	}
 
 	return StdSignature{
-		PubKey:    pubKeyBz,
+		PubKey:    sig.PubKey,
 		Signature: sigBz,
 	}, nil
 }
diff --git a/x/auth/types/stdtx_test.go b/x/auth/types/stdtx_test.go
index 70d0ff2f74..829f1ef4e8 100644
--- a/x/auth/types/stdtx_test.go
+++ b/x/auth/types/stdtx_test.go
@@ -46,7 +46,7 @@ func NewTestTx(ctx sdk.Context, msgs []sdk.Msg, privs []crypto.PrivKey, accNums
 			panic(err)
 		}
 
-		sigs[i] = StdSignature{PubKey: priv.PubKey().Bytes(), Signature: sig}
+		sigs[i] = StdSignature{PubKey: priv.PubKey(), Signature: sig}
 	}
 
 	tx := NewStdTx(msgs, fee, sigs, "")
@@ -184,11 +184,11 @@ func TestStdSignatureMarshalYAML(t *testing.T) {
 			"|\n  pubkey: \"\"\n  signature: \"\"\n",
 		},
 		{
-			StdSignature{PubKey: pubKey.Bytes(), Signature: []byte("dummySig")},
+			StdSignature{PubKey: pubKey, Signature: []byte("dummySig")},
 			fmt.Sprintf("|\n  pubkey: %s\n  signature: 64756D6D79536967\n", sdk.MustBech32ifyPubKey(sdk.Bech32PubKeyTypeAccPub, pubKey)),
 		},
 		{
-			StdSignature{PubKey: pubKey.Bytes(), Signature: nil},
+			StdSignature{PubKey: pubKey, Signature: nil},
 			fmt.Sprintf("|\n  pubkey: %s\n  signature: \"\"\n", sdk.MustBech32ifyPubKey(sdk.Bech32PubKeyTypeAccPub, pubKey)),
 		},
 	}
@@ -206,7 +206,7 @@ func TestSignatureV2Conversions(t *testing.T) {
 	sdk.RegisterCodec(cdc)
 	RegisterCodec(cdc)
 	dummy := []byte("dummySig")
-	sig := StdSignature{PubKey: pubKey.Bytes(), Signature: dummy}
+	sig := StdSignature{PubKey: pubKey, Signature: dummy}
 
 	sigV2, err := StdSignatureToSignatureV2(cdc, sig)
 	require.NoError(t, err)
@@ -247,7 +247,7 @@ func TestSignatureV2Conversions(t *testing.T) {
 	require.NoError(t, err)
 
 	sigV2, err = StdSignatureToSignatureV2(cdc, StdSignature{
-		PubKey:    multiPK.Bytes(),
+		PubKey:    multiPK,
 		Signature: msig,
 	})
 	require.NoError(t, err)
@@ -264,7 +264,7 @@ func TestGetSignaturesV2(t *testing.T) {
 	RegisterCodec(cdc)
 
 	fee := NewStdFee(50000, sdk.Coins{sdk.NewInt64Coin("atom", 150)})
-	sig := StdSignature{PubKey: pubKey.Bytes(), Signature: dummy}
+	sig := StdSignature{PubKey: pubKey, Signature: dummy}
 	stdTx := NewStdTx([]sdk.Msg{testdata.NewTestMsg()}, fee, []StdSignature{sig}, "testsigs")
 
 	sigs, err := stdTx.GetSignaturesV2()
diff --git a/x/auth/types/txbuilder.go b/x/auth/types/txbuilder.go
index 8fe98c92de..9ba806aa55 100644
--- a/x/auth/types/txbuilder.go
+++ b/x/auth/types/txbuilder.go
@@ -300,7 +300,7 @@ func MakeSignature(kr keyring.Keyring, name string, msg StdSignMsg) (sig StdSign
 	}
 
 	return StdSignature{
-		PubKey:    pubkey.Bytes(),
+		PubKey:    pubkey,
 		Signature: sigBytes,
 	}, nil
 }