Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4932
Number of amino acids:360
Molecular Weight:39077.57 Da
Theoretical pI:9.19


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)185%
Cysteine CYS (C)82.22%
Glutamic Acid GLU (E)102.78%
Aspartic Acid ASP (D)185%
Glycine GLY (G)236.39%
Phynylalanine PHE (F)133.61%
Isoleucine ILE (I)318.61%
Histidine HIS (H)71.94%
Lysine LYS (K)123.33%
Methionine MET (M)51.39%
Leucine LEU (L)3610%
Asparagine ASN (N)154.17%
Glutamine GLN (Q)113.06%
Proline PRO (P)6016.67%
Serine SER (S)185%
Arginine ARG (R)246.67%
Threonine THR (T)287.78%
Tryptophan TRP (W)00%
Valine VAL (V)195.28%
Tyrosine TYR (Y)41.11%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1760
HydrogenH2832
NitrogenN484
OxygenO493
SulphurS13

FormulaC1760H2832N484O493S13
Total Number of Atoms:5582


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):28
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    6460
Absorption 0.1% (=1 g/l)    0.165,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.153,   assuming all CYS residues are reduced
Aromaticity:0.047

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 63.41

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.61, 32.22, 19.17]

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:92.8889
Grand average of hydropathicity (GRAVY):-0.16