Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4647
Number of amino acids:214
Molecular Weight:22608.38 Da
Theoretical pI:7.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)219.81%
Cysteine CYS (C)52.34%
Glutamic Acid GLU (E)73.27%
Aspartic Acid ASP (D)73.27%
Glycine GLY (G)2310.75%
Phynylalanine PHE (F)177.94%
Isoleucine ILE (I)146.54%
Histidine HIS (H)31.4%
Lysine LYS (K)104.67%
Methionine MET (M)52.34%
Leucine LEU (L)209.35%
Asparagine ASN (N)115.14%
Glutamine GLN (Q)62.8%
Proline PRO (P)167.48%
Serine SER (S)73.27%
Arginine ARG (R)52.34%
Threonine THR (T)177.94%
Tryptophan TRP (W)00%
Valine VAL (V)177.94%
Tyrosine TYR (Y)31.4%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1032
HydrogenH1618
NitrogenN262
OxygenO287
SulphurS10

FormulaC1032H1618N262O287S10
Total Number of Atoms:3209


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    4720
Absorption 0.1% (=1 g/l)    0.209,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.198,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.18, 26.64, 24.77]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:94.8131
Grand average of hydropathicity (GRAVY):0.38