Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4626
Number of amino acids:217
Molecular Weight:23194.71 Da
Theoretical pI:7.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)94.15%
Cysteine CYS (C)31.38%
Glutamic Acid GLU (E)52.3%
Aspartic Acid ASP (D)115.07%
Glycine GLY (G)177.83%
Phynylalanine PHE (F)115.07%
Isoleucine ILE (I)104.61%
Histidine HIS (H)52.3%
Lysine LYS (K)94.15%
Methionine MET (M)41.84%
Leucine LEU (L)2611.98%
Asparagine ASN (N)94.15%
Glutamine GLN (Q)83.69%
Proline PRO (P)177.83%
Serine SER (S)2310.6%
Arginine ARG (R)73.23%
Threonine THR (T)188.29%
Tryptophan TRP (W)00%
Valine VAL (V)2210.14%
Tyrosine TYR (Y)31.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1039
HydrogenH1664
NitrogenN274
OxygenO311
SulphurS7

FormulaC1039H1664N274O311S7
Total Number of Atoms:3295


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):16
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    4595
Absorption 0.1% (=1 g/l)    0.198,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.193,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.86

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.18, 30.41, 20.28]

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:98.2488
Grand average of hydropathicity (GRAVY):0.14